Nissan Pathfinder: Dtc/circuit Diagnosis (P0441 Evap Control System ... P0524 Engine Oil Pressure)

• P0441 Evap Control System
• P0443 Evap Canister Purge Volume Control Solenoid Valve
• P0447 Evap Canister Vent Control Valve
• P0450 Evap Control System Pressure Sensor
• P0461 Fuel Level Sensor
• P0500 Vss
• P0506 Isc System
• P050a Cold Start Control
• P0520 Eop Sensor
• P0524 Engine Oil Pressure

P0441 Evap Control System Nissan Pathfinder SUV

DTC Description

In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions. Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.

Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow are adequate. If not, a malfunction is determined.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0441	00	EVAP PURG FLOW/MON (Evaporative emission system incorrect purge flow)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	EVAP control system does not operate properly, EVAP control system has a leak between intake manifold and EVAP control system pressure sensor
			Diagnosis delay time	—

POSSIBLE CAUSE

• EVAP canister purge volume control solenoid valve stuck closed

• EVAP control system pressure sensor and the circuit

• Loose, disconnected or improper connection of rubber tube

• Blocked rubber tube

• Cracked EVAP canister

• EVAP canister purge volume control solenoid valve circuit

• Accelerator pedal position sensor

• Blocked purge port

• EVAP canister vent control valve

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is DTC P2122, P2123, P2127, P2128 or P2138 detected?

YES>>

Perform diagnosis of applicable.

• DTC P2122: Refer to DTC Description.

• DTC P2123: Refer to DTC Description.

• DTC P2127: Refer to DTC Description.

• DTC P2128: Refer to DTC Description.

• DTC P2138: Refer to DTC Description.

NO>>

GO TO 2.

INSPECTION START

 

Do you have CONSULT?

YES>>

GO TO 3.

NO>>

GO TO 7.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Always perform test at a temperature of 5°C (41°F) or more.

 

>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Turn ignition switch OFF and wait at least 10 seconds.

5. Start engine and let it idle for at least 70 seconds.

6. On CONSULT screen, select “ENGINE”>>“DTC Work Support”>>“EVAPORATIVE SYSTEM”>>“PURG FLOW P0441”.

7. Touch “START”.

Is “COMPLETED” displayed on CONSULT screen?

YES>>

GO TO 6.

NO>>

GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE-II

When the following conditions are met, “TESTING” will be displayed on the CONSULT screen. Maintain the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take at least 35 seconds.)

Selector lever	Suitable position
VHCL SPEED SE	32 – 120 km/h (20 – 75 mph)
ENG SPEED	500 – 3,000 rpm
B/FUEL SCHDL	1.25 – 7.6 msec
COOLAN TEMP/S	More than 0°C (32°F)

CAUTION:

Always drive Nissan Pathfinder vehicle at a safe speed.

 

Is “COMPLETED” displayed on CONSULT screen?

YES>>

GO TO 6.

NO>>

Perform DTC CONFIRMATION PROCEDURE again. GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-III

Touch “SELF-DIAG RESULTS”.

Is “OK” displayed on CONSULT screen?

YES-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to Diagnosis Procedure.

PERFORM COMPONENT FUNCTION CHECK

NOTE:

Use component function check to check the overall monitoring function of the EVAP control system purge flow monitoring. During this check, a 1st trip DTC might not be confirmed.

 

Without CONSULT

1. Lift up drive wheels.

2. Start engine (VDC switch OFF) and warm it up to normal operating temperature.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Turn ignition switch OFF and wait at least 10 seconds.

6. Start engine and wait at least 70 seconds.

7. Set voltmeter probes to ECM harness connector terminals as per the following.

   ECM
   Connector	+	−
   	Terminal
   E32	173	200

8. Check EVAP control system pressure sensor value at idle speed and note it.

9. Establish and maintain the following conditions for at least 1 minute.

   Air conditioner switch	ON
   Headlamp switch	ON
   Rear window defogger switch	ON
   Engine speed	Approx. 3,000 rpm
   Gear position	Any position other than P, N or R

10. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (measured at step 8) for at least 1 second.

Is the inspection result normal?

YES-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to Diagnosis Procedure.

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is DTC P2122, P2123, P2127, P2128 or P2138 detected?

YES>>

Perform diagnosis of applicable.

• DTC P2122: Refer to DTC Description.

• DTC P2123: Refer to DTC Description.

• DTC P2127: Refer to DTC Description.

• DTC P2128: Refer to DTC Description.

• DTC P2138: Refer to DTC Description.

NO>>

GO TO 2.

CHECK EVAP CANISTER

1. Turn ignition switch OFF.

2. Check EVAP canister for cracks.

Is the inspection result normal?

YES-1>>

With CONSULT: GO TO 3.

YES-2>>

Without CONSULT: GO TO 4.

NO>>

Replace EVAP canister. Refer to Removal and Installation.

CHECK PURGE FLOW

With CONSULT

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.

2. Start engine and let it idle.

3. On CONSULT screen, select “ENGINE”>>“Active Test”>>“PURG VOL CONT/V”.

4. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG VOL C/V” opening and check vacuum existence.

   PURG VOL C/V	Vacuum
   100%	Existed
   0%	Not existed

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

GO TO 5.

CHECK PURGE FLOW

Without CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Stop engine.

3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge. For the location of EVAP service port, refer to Component Parts Location.

4. Start engine and let it idle.

   Do not depress accelerator pedal even slightly.

5. Check vacuum gauge indication before 60 seconds passed after starting engine.

   Vacuum should not exist.

6. Revving engine up to 2,000rpm after 100 seconds passed after starting engine.

   Vacuum should exist.

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

GO TO 5.

CHECK EVAP PURGE LINE

1. Turn ignition switch OFF.

2. Check EVAP purge line for improper connection or disconnection.

   Refer to System Description.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair it.

CHECK EVAP PURGE HOSE AND PURGE PORT

1. Disconnect purge hoses connected to EVAP service port and EVAP canister purge volume control solenoid valve .

   

2. Blow air into each hose and EVAP purge port .

3. Check that air flows freely.

   

Is the inspection result normal?

YES-1>>

With CONSULT: GO TO 7.

YES-2>>

Without CONSULT: GO TO 8.

NO>>

Repair or clean hoses and/or purge port.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

1. Start engine.

2. On CONSULT screen, select “ENGINE”>>“Active Test”>>“PURG VOL CONT/V”.

3. Check that engine speed varies according to the valve opening.

Does engine speed vary according to the valve opening?

YES>>

GO TO 9.

NO>>

GO TO 8.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Replace EVAP canister purge volume control solenoid valve. Refer to Component Parts Location.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.

2. Check connectors for water.

   Water should not exist.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to DTC Description for DTC P0452, DTC Description for DTC P0453.

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

CHECK RUBBER TUBE FOR CLOGGING

1. Disconnect rubber tube connected to EVAP canister vent control valve.

2. Check the rubber tube for clogging.

Is the inspection result normal?

YES>>

GO TO 12.

NO>>

Clean the rubber tube using an air blower.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 13.

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

CHECK EVAP PURGE LINE

Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.

Refer to System Description.

Is the inspection result normal?

YES>>

GO TO 14.

NO>>

Replace it.

CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.

 

>>

INSPECTION END

P0443 Evap Canister Purge Volume Control Solenoid Valve Nissan Pathfinder R53

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0443	00	PURG VOLUME CONT/V (Evaporative emission system purge control valve circuit)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	The canister purge flow is detected during the specified driving conditions, even when EVAP canister purge volume control solenoid valve is completely closed
			Diagnosis delay time	—

POSSIBLE CAUSE

• EVAP control system pressure sensor

• EVAP canister purge volume control solenoid valve (The valve is stuck open.)

• EVAP canister vent control valve

• EVAP canister

• Hoses (Hoses are connected incorrectly or clogged.)

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Always perform test at a temperature of 5°C (41°F) or more.

Do you have CONSULT

YES>>

GO TO 2.

NO>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Turn ignition switch OFF and wait at least 10 seconds.

5. Turn ignition switch ON.

6. On CONSULT screen, select “ENGINE”>>“DTC Work Support”>>“EVAPORATIVE SYSTEM”>>“PURG VOL CN/V P1444”.

7. Touch “START”.

8. Start engine and let it idle until “TESTING” on CONSULT changes to “COMPLETED”. (It will take approximately 10 seconds.)

   If “TESTING” is not displayed after 5 minutes, retry from step 2.

9. Touch “SELF-DIAG RESULTS”.

Is “OK” displayed on CONSULT screen?

YES-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to Diagnosis Procedure.

PERFORM DTC CONFIRMATION PROCEDURE

With GST

1. Start engine and warm it up to normal operating temperature.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Turn ignition switch OFF and wait at least 10 seconds.

5. Start engine and let it idle for at least 20 seconds.

6. Check 1st trip DTC.

Is DTC P0443 displayed?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect EVAP canister purge volume control solenoid valve harness connector.

3. Turn ignition switch ON.

4. Check the voltage between EVAP canister purge volume control solenoid valve harness connector and ground.

   +		−	Voltage
   EVAP canister purge volume control solenoid valve
   Connector	Terminal
   F16	2	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and IPDM E/R harness connector.

   EVAP canister purge volume control solenoid valve		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F16	2	F24	73	Existed

4. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and ECM harness connector.

   EVAP canister purge volume control solenoid valve		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F16	1	F79	152	Existed

4. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.

2. Check connectors for water.

   Water should not exist.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to Component Inspection.

Is the inspection result normal?

YES-1>>

With CONSULT: GO TO 6.

YES-2>>

Without CONSULT: GO TO 7.

NO>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect harness connectors disconnected.

3. Start the engine.

4. On CONSULT screen, select “ENGINE”>>“Active Test”>>“PURG VOL CONT/V”.

5. Check that engine speed varies according to the valve opening.

Does engine speed vary according to the valve opening?

YES>>

GO TO 8.

NO>>

GO TO 7.

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Replace EVAP canister purge volume control solenoid valve. Refer to Component Parts Location.

CHECK RUBBER TUBE FOR CLOGGING

1. Disconnect rubber tube connected to EVAP canister vent control valve.

2. Check the rubber tube for clogging.

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Clean the rubber tube using an air blower.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.

2. Check if water will drain from EVAP canister.

   

Does water drain from the EVAP canister?

YES>>

GO TO 11.

NO>>

INSPECTION END

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

The weight should be less than 2.1 kg (4.6 lb).

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 12.

DETECT MALFUNCTIONING PART

Check the following.

• EVAP canister for damage

• EVAP hose between EVAP canister and Nissan Pathfinder vehicle frame for clogging or poor connection

>>

Repair hose or replace EVAP canister.

Component Inspection

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.

4. Start the engine.

5. On CONSULT screen, select “ENGINE”>>“Active Test”>>“PURG VOL CONT/V”.

6. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG VOL C/V” opening and check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

   

Condition (PURG VOL C/V value)	Air passage continuity between and
100%	Existed
0%	Not existed

Without CONSULT

1. Turn ignition switch OFF.

2. Disconnect EVAP canister purge volume control solenoid valve harness connector.

3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.

4. Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

   

   Condition	Air passage continuity between and
   12V direct current supply between terminals 1 and 2	Existed
   No supply	Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace EVAP canister purge volume control solenoid valve. Refer to Component Parts Location.

P0447 Evap Canister Vent Control Valve Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0447	00	VENT CONTROL VALVE (Evaporative emission system vent control circuit open)	Diagnosis condition	Engine running at idle
			Signal (terminal)	EVAP canister vent control valve signal
			Threshold	An improper voltage signal is sent to ECM through EVAP canister vent control valve
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (EVAP canister vent control valve circuit is open or shorted.)

• EVAP canister vent control valve

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm battery voltage is more than 11 V at idle.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and wait at least 8 seconds.

2. Check 1st trip DTC.

Is DTC P0447 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

INSPECTION START

Do you have CONSULT?

YES>>

GO TO 2.

NO>>

GO TO 3.

CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT

With CONSULT

1. Turn ignition switch OFF and then ON.

2. On CONSULT screen, select “ENGINE”>>“Active Test”>>“VENT CONTROL/V”.

3. Touch “ON/OFF” on CONSULT screen.

4. Check for operating sound of the valve.

   Clicking sound should be heard.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 3.

CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect EVAP canister vent control valve harness connector.

3. Turn ignition switch ON.

4. Check the voltage between EVAP canister vent control valve harness connector and ground.

   +		−	Voltage
   EVAP canister vent control valve
   Connector	Terminal
   B31	1	Ground	Battery voltage

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

GO TO 4.

CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connector.

3. Check the continuity between EVAP canister vent control valve harness connector and IPDM E/R harness connector.

   EVAP canister vent control valve		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   B31	1	F24	78	Existed

4. Also check harness for short to ground.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts.

CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between EVAP canister vent control valve harness connector and ECM harness connector.

   EVAP canister vent control valve		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   B31	2	E32	193	Existed

4. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace error-detected parts.

CHECK RUBBER TUBE FOR CLOGGING

1. Disconnect rubber tube connected to EVAP canister vent control valve.

2. Check the rubber tube for clogging.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Clean the rubber tube using an air blower.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

Component Inspection

CHECK EVAP CANISTER VENT CONTROL VALVE-I

1. Turn ignition switch OFF.

2. Remove EVAP canister vent control valve from EVAP canister. Refer to Removal and Installation.

3. Check portion of EVAP canister vent control valve for rust.

   

Is it rusted?

YES>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

NO>>

GO TO 2.

CHECK EVAP CANISTER VENT CONTROL VALVE-II

With CONSULT

1. Reconnect harness connectors disconnected.

2. Turn ignition switch ON.

3. On CONSULT screen, select “ENGINE”>>“Active Test”>>“VENT CONTROL/V”.

4. Check air passage continuity and operation delay time.

   

   Make sure that new O-ring is installed properly.

   Condition VENT CONT/V	Air passage continuity between and
   ON	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Without CONSULT

1. Disconnect EVAP canister vent control valve harness connector.

2. Check air passage continuity and operation delay time under the following conditions.

   

   Make sure that new O-ring is installed properly.

   Condition	Air passage continuity between and
   12 V direct current supply between terminals 1 and 2	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

CHECK EVAP CANISTER VENT CONTROL VALVE-III

With CONSULT

1. Clean the air passage [portion to ] of EVAP canister vent control valve using an air blower.

2. On CONSULT screen, select “ENGINE”>>“Active Test”>>“VENT CONTROL/V”.

3. Check air passage continuity and operation delay time.

   

   Make sure that new O-ring is installed properly.

   Condition VENT CONT/V	Air passage continuity between and
   ON	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Without CONSULT

1. Clean the air passage [portion to ] of EVAP canister vent control valve using an air blower.

2. Check air passage continuity and operation delay time under the following conditions.

   

   Make sure that new O-ring is installed properly.

   Condition	Air passage continuity between and
   12 V direct current supply between terminals 1 and 2	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

P0450 Evap Control System Pressure Sensor Nissan Pathfinder 2022

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0450	00	EVAP SYS PRES SEN (EVAP System Pressure Sensor/Switch "A" Circuit)	Diagnosis condition	—
			Signal (terminal)	EVAP control system pressure sensor signal
			Threshold	An excessively low or high voltage from the sensor is sent to ECM
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (EVAP control system pressure sensor circuit is shorted.)

• EVAP control system pressure sensor

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Always perform test at a temperature of 5°C (41°F) or more.

 

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

5. Make sure that “FUEL T/TMP SE” indication is more than 0°C (32°F).

6. Start engine and wait at least 20 seconds.

7. Check 1st trip DTC.

With GST

1. Start engine and warm it up to normal operating temperature.

2. Set voltmeter probes to ECM harness connector terminals as per the following.

   ECM			Voltage
   Connector	+	−
   	Terminal
   E32	180	204	Less than 4.2 V

3. Make sure that the voltage is less than 4.2 V.

4. Turn ignition switch OFF and wait at least 10 seconds.

5. Start engine and wait at least 20 seconds.

6. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

1. Turn ignition switch OFF.

2. Disconnect EVAP control system pressure sensor harness connector.

3. Check sensor harness connector for water.

   Water should not exist.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace harness connector.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY

1. Turn ignition switch ON.

2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

   +		−	Voltage (Approx.)
   EVAP control system pressure sensor
   Connector	Terminal
   B36	3	Ground	5 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

   +		−		Continuity
   EVAP control system pressure sensor		ECM
   Connector	Terminal	Connector	Terminal
   B36	3	E32	177	Existed

4. Also check harness for short to ground and to power.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for power supply circuit.

NO>>

Repair or replace error-detected parts

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

   +		−		Continuity
   EVAP control system pressure sensor		ECM
   Connector	Terminal	Connector	Terminal
   B36	1	E32	200	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace error-detected parts.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT

1. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

   +		−		Continuity
   EVAP control system pressure sensor		ECM
   Connector	Terminal	Connector	Terminal
   B36	2	E32	173	Existed

2. Also check harness for short to ground and to power.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace error-detected parts.

CHECK RUBBER TUBE

1. Disconnect rubber tube connected to EVAP canister vent control valve.

2. Check the rubber tube for clogging.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Clean the rubber tube using an air blower, repair or replace rubber tube.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.

2. Check if water will drain from the EVAP canister.

   

Does water drain from EVAP canister?

YES>>

GO TO 9.

NO>>

Check intermittent incident. Refer to Intermittent Incident.

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

The weight should be less than 2.1 kg (4.6 lb).

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 10.

DETECT MALFUNCTIONING PART

Check the following.

• EVAP canister for damage

• EVAP hose between EVAP canister and Nissan Pathfinder vehicle frame for clogging or poor connection

Is the inspection result normal?

YES>>

Replace EVAP control system pressure sensor. Refer to Removal and Installation.

NO>>

Repair hose or replace EVAP canister. Refer to Removal and Installation.

Component Inspection

CHECK EVAP CANISTER VENT CONTROL VALVE-I

1. Turn ignition switch OFF.

2. Remove EVAP canister vent control valve from EVAP canister. Refer to Removal and Installation.

3. Check portion of EVAP canister vent control valve for rust.

   

Is it rusted?

YES>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

NO>>

GO TO 2.

CHECK EVAP CANISTER VENT CONTROL VALVE-II

With CONSULT

1. Reconnect harness connectors disconnected.

2. Turn ignition switch ON.

3. On CONSULT screen, select “ENGINE”>>“Active Test”>>“VENT CONTROL/V”.

4. Check air passage continuity and operation delay time.

   

   Make sure that new O-ring is installed properly.

   Condition VENT CONT/V	Air passage continuity between and
   ON	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Without CONSULT

1. Disconnect EVAP canister vent control valve harness connector.

2. Check air passage continuity and operation delay time under the following conditions.

   

   Make sure that new O-ring is installed properly.

   Condition	Air passage continuity between and
   12 V direct current supply between terminals 1 and 2	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

CHECK EVAP CANISTER VENT CONTROL VALVE-III

With CONSULT

1. Clean the air passage [portion to ] of EVAP canister vent control valve using an air blower.

2. On CONSULT screen, select “ENGINE”>>“Active Test”>>“VENT CONTROL/V”.

3. Check air passage continuity and operation delay time.

   

   Make sure that new O-ring is installed properly.

   Condition VENT CONT/V	Air passage continuity between and
   ON	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Without CONSULT

1. Clean the air passage [portion to ] of EVAP canister vent control valve using an air blower.

2. Check air passage continuity and operation delay time under the following conditions.

   

   Make sure that new O-ring is installed properly.

   Condition	Air passage continuity between and
   12 V direct current supply between terminals 1 and 2	Not existed
   OFF	Existed

   Operation takes less than 1 second.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace EVAP canister vent control valve. Refer to Removal and Installation.

P0461 Fuel Level Sensor Nissan Pathfinder 5th Gen

DTC Description

Driving long distances naturally affect fuel gauge level.

This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has been driven.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0461	00	FUEL LEVEL SENSOR (Fuel level sensor “A” circuit range/performance)	Diagnosis condition	—
			Signal (terminal)	Fuel level sensor signal
			Threshold	The output signal of the fuel level sensor does not change within the specified range even though the Nissan Pathfinder vehicle has been driven a long distance
			Diagnosis delay time	—

POSSIBLE CAUSE

• Harness or connectors (CAN communication line is open or shorted)

• Harness or connectors (Fuel level sensor circuit is open or shorted)

• Combination meter

• Fuel level sensor

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P0461 is displayed with DTC UXXXX or P0607, first perform the confirmation procedure (trouble diagnosis) for DTC UXXXX or P0607.

Is DTC UXXXX or P0607 detected?

YES>>

Perform diagnosis of applicable.

• DTC UXXXX: Refer to DTC Index.

• DTC P0607: Refer to DTC Description.

NO>>

GO TO 2.

PRECONDITIONING

WARNING:

When performing the following procedure, always observe the handling of the fuel. Refer to General Precautions.

TESTING CONDITION:

Before starting component function check, preparation of draining fuel and refilling fuel is required.

Do you have CONSULT?

YES>>

GO TO 3.

NO>>

GO TO 4.

PERFORM COMPONENT FUNCTION CHECK

NOTE:

Use component function check to check the overall function of the fuel level sensor. During this check, a 1st trip DTC might not be confirmed.

With CONSULT

NOTE:

Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8 Imp gal) in advance.

1. Prepare a fuel container and a spare hose.

2. Release fuel pressure from fuel line, refer to Work Procedure.

3. Remove the fuel feed hose on the fuel level sensor unit.

4. Connect a spare fuel hose where the fuel feed hose was removed.

5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.

6. On CONSULT screen, select “ENGINE”>>“Data Monitor”>>“FUEL LEVEL SE”.

7. Check “FUEL LEVEL SE” output voltage and note it.

8. On CONSULT screen, select “ENGINE”>>“Active Test”>>“FUEL PUMP RELAY”.

9. Touch “ON” and drain fuel approximately 30 (7-7/8 US gal, 6-5/8 Imp gal) and stop it.

10. Check “FUEL LEVEL SE” output voltage and note it.

11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).

12. Check “FUEL LEVEL SE” output voltage and note it.

13. Confirm whether the voltage changes more than 0.03V during step 7 to 10 and 10 to 12.

Is the inspection result normal?

YES-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to Diagnosis Procedure.

PERFORM COMPONENT FUNCTION CHECK

Without CONSULT

NOTE:

Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8 Imp gal) in advance.

1. Prepare a fuel container and a spare hose.

2. Release fuel pressure from fuel line. Refer to Work Procedure.

3. Remove the fuel feed hose on the fuel level sensor unit.

4. Connect a spare fuel hose where the fuel feed hose was removed.

5. Turn ignition switch ON.

6. Drain fuel by 30 (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.

7. Confirm that the fuel gauge indication varies.

8. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).

9. Confirm that the fuel gauge indication varies.

Is the inspection result normal?

YES-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to Diagnosis Procedure.

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P0461 is displayed with DTC UXXXX or P0607, first perform the confirmation procedure (trouble diagnosis) for DTC UXXXX or P0607.

Is DTC UXXXX or P0607 detected?

YES>>

Perform diagnosis of applicable.

• DTC UXXXX: Refer to DTC Index.

• DTC P0607: Refer to DTC Description.

NO>>

GO TO 2.

CHECK DTC WITH COMBINATION METER

Check DTC with combination meter.

• FULL TFT METER: Refer to CONSULT Function (METER/M&A).

• 7 INCH INFORMATION DISPLAY: Refer to CONSULT Function (METER/M&A).

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Proceed to component function check.

• FULL TFT METER: Refer to DiagnosisProcedure.

• 7 INCH INFORMATION DISPLAY: Refer to DiagnosisProcedure.

P0500 Vss Nissan Pathfinder 2025

DTC Description

ECM receives vehicle speed signals from two different paths via CAN communication line: One is from the ABS actuator and electric unit (control unit) via the combination unit and the other is from TCM.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0500	00	Nissan Pathfinder Vehicle SPEED SEN A (Vehicle speed sensor “A”)	Diagnosis condition	Selector lever: D position Nissan Pathfinder Vehicle speed: 20 km/h (13 MPH)
			Signal (terminal)	Nissan Pathfinder Vehicle speed signal
			Threshold	The difference between a Nissan Pathfinder vehicle speed calculated by a output speed sensor transmitted from TCM to ECM via CAN communication and the Nissan Pathfinder vehicle speed indicated on the combination meter exceeds 15 km/h (10 MPH)
			Diagnosis delay time	5 seconds or more

POSSIBLE CAUSE

• Harness or connector (CAN communication line is open or shorted.)

• Combination meter

• ABS actuator and electric unit (control unit)

• Wheel sensor

• TCM

• Output speed sensor

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).
	Idle speed control	Stops feedback control of idle speed and controls with specified speed.
	Recovery speed control at decelerating	Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
	Idle neutral control	Stops idle neutral control.

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine.

2. Shift the selector lever to D range and wait at least for 2 seconds.

3. Drive the Nissan Pathfinder vehicle at least 5 seconds at 20 km/h (13 MPH) or more.

   CAUTION:

   Always drive vehicle at a safe speed.

   NOTE:

   This procedure may be conducted with the drive wheels lifted in the shop or by driving the Nissan Pathfinder vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.

4. Check 1st trip DTC.

Is DTC P0500 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC WITH TCM

Check DTC with TCM. Refer to CONSULT Function.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Perform trouble shooting relevant to DTC indicated.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check DTC with ABS actuator and electric unit (control unit). Refer to CONSULT Function.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Perform trouble shooting relevant to DTC indicated.

CHECK DTC WITH COMBINATION METER

Check DTC with combination meter.

• FULL TFT METER: Refer to CONSULT Function (METER/M&A).

• 7 INCH INFORMATION DISPLAY: Refer to CONSULT Function (METER/M&A).

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Perform trouble shooting relevant to DTC indicated.

CHECK OUTPUT SPEED SENSOR

Check output speed sensor. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace or replace error-detected parts.

CHECK WHEEL SENSOR

Check wheel sensor. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace or replace error-detected parts.

P0506 Isc System Nissan Pathfinder R53

DTC Description

The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The crankshaft position sensor 1 (POS) detects the actual engine speed and sends a signal to the ECM.

The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan operation, etc.).

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0506	00	ISC SYSTEM (Idle air control system RPM lower than expected)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	The idle speed is less than the target idle speed by 100 rpm or more
			Diagnosis delay time	—

POSSIBLE CAUSE

• Electric throttle control actuator

• Intake air leak

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P0506 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

If the idle speed is out of the specified value, perform Description, before conducting DTC Confirmation Procedure.

TESTING CONDITION:

• Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

• Always perform the test at a temperature above −10°C(14°F).

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and warm it up to normal operating temperature.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Turn ignition switch OFF and wait at least 10 seconds.

5. Restart engine and run it for at least 1 minute at idle speed.

6. Check 1st trip DTC.

Is DTC P0506 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P0506 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

CHECK INTAKE AIR LEAK

1. Start engine and let it idle.

2. Listen for an intake air leak after the mass air flow sensor.

Is intake air leak detected?

YES>>

Discover air leak location and repair.

NO>>

GO TO 3.

REPLACE ECM

1. Stop the engine.

2. Replace ECM. Refer to Removal and Installation.

3. Proceed to Description.

>>

INSPECTION END

P050a Cold Start Control Nissan Pathfinder 2025

DTC Description

ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition.

This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P050A	00	COLD START CONTROL (Cold start idle air control system performance)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	ECM does not control engine idle speed properly when engine is started with pre-warming up condition
			Diagnosis delay time	—

POSSIBLE CAUSE

• Lack of intake air volume

• Fuel injection system

• ECM

FAIL-SAFE

Fail safe mode		Nissan Pathfinder Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. NOTE: ECM does not control the accelerator pedal releasing speed.
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

DTC Confirmation Procedure

CHECK DTC PRIORITY

If DTC P050A is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>>

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. On CONSULT screen, select “ENGINE”>>“Data Monitor”.

4. Check the indication of “COOLAN TEMP/S”.

With GST

Follow the procedure “With CONSULT” above.

Is the value of “COOLAN TEMP/S” between 4°C (39°F) and 36°C (97°F)?

YES>>

GO TO 4.

NO-1 [If it is below 4°C (39°F)]>>

Warm up the engine until the value of “COOLAN TEMP/S” reaches 4°C (39°F) or more. Retry from step 1.

NO-2 [If it is above 36°C (97°F)]>>

Cool engine down to less than 36°C (97°F). Retry from step 1.

PERFORM DTC CONFIRMATION PROCEDURE-II

With CONSULT

1. Set the select lever in N range.

2. Start the engine and warm up in idle with the value of “COOLAN TEMP/S” between 4°C (39°F) and 40°C (104°F) for more than 15 seconds.

3. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

Is DTC P050A detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P050A is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index.

NO>>

GO TO 2.

PERFORM IDLE AIR VOLUME LEARNING

Perform Description.

Is Idle Air Volume Learning carried out successfully?

YES>>

GO TO 3.

NO>>

Follow the instruction of Idle Air Volume Learning.

CHECK Intake system

Check for the cause of intake air volume lacking. Refer to the following.

• Crushed intake air passage

• Intake air passage clogging

• Clogging of throttle body

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace malfunctioning part

CHECK FUEL INJECTION SYSTEM FUNCTION

Perform all DTC CONFIRMATION PROCEDURE related for DTC P0171, P0174.

• For DTC P0171, Refer to DTC Description.

• For DTC P0174, Refer to DTC Description.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Perform Diagnosis Procedure related for DTC P0171, P0174.

• For DTC P0171, Refer to Diagnosis Procedure.

• For DTC P0174, Refer to Diagnosis Procedure.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC Confirmation Procedure.

   See DTC Description.

Is the DTC P050A displayed again?

YES>>

GO TO 6.

NO>>

INSPECTION END

REPLACE ECM

1. Replace ECM. Refer to Removal and Installation.

2. Proceed to Description.

>>

INSPECTION END

P0520 Eop Sensor Nissan Pathfinder 2025

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0520	00	EOP SENSOR/SWITCH [Engine oil pressure (EOP) sensor circuit]	Diagnosis condition	Ignition switch ON
			Signal (terminal)	Engine oil pressure sensor signal
			Threshold	A voltage signal transmitted from the engine oil pressure sensor is lower than 0.3 V A voltage signal transmitted from the engine oil pressure sensor is higher than 5.02 V
			Diagnosis delay time	5 seconds or more

POSSIBLE CAUSE

• Harness or connectors (Engine oil pressure sensor circuit is open or shorted.)

• Engine oil level abnormality

• Engine oil pressure sensor

• Sensor power supply 1 circuit

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 5 seconds.

2. Check 1st trip DTC.

Is DTC P0520 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EOP SENSOR POWER SUPPLY-I

1. Turn ignition switch OFF.

2. Disconnect EOP sensor harness connector.

3. Turn ignition switch ON.

4. Check the voltage between EOP sensor harness connector terminals.

   EOP sensor			Voltage (Approx.)
   Connector	+	−
   	terminal
   F54	3	1	5 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK EOP SENSOR SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connectors.

3. Check the continuity between EOP sensor harness connector and ECM harness connector.

   EOP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F54	2	F78	62	Existed

4. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK EOP SENSOR

Check EOP sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

CHECK EOP SENSOR POWER SUPPLY-II

Check the voltage between EOP sensor harness connector terminal and ground.

+		−	Voltage (Approx.)
EOP sensor
Connector	Terminal
F54	3	Ground	5 V

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

GO TO 5.

CHECK EOP SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connectors.

3. Check the continuity between EOP sensor harness connector and ECM harness connector.

   EOP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F54	3	F78	42	Existed

4. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace error-detected parts.

CHECK SENSOR POWER SUPPLY 1 CIRCUIT

Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

Perform the trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure.

NO>>

Repair or replace error-detected parts.

CHECK EOP SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between EOP sensor harness connector and ECM harness connector.

   EOP sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F54	1	F78	29	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Repair or replace error-detected parts.

CHECK ECM GROUND CIRCUIT

1. Check the continuity between ECM harness connector and ground.

   ECM		—	Continuity
   Connector	Terminal
   F78	3	Ground	Existed
   F79	87
   E32	199
   	201
   	204

2. Also check harness for short to power.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

Component Inspection

CHECK EOP SENSOR

1. Turn ignition switch OFF.

2. Disconnect EOP sensor harness connector.

3. Check resistance between EOP sensor connector terminals.

   EOP sensor		Condition	Resistance
   Terminal
   1	2	None	4 – 10 kΩ
   	3		2 – 8 kΩ
   2	3		1 – 3 kΩ

Is the inspection result normal?

YES>>

INSPECTION END.

NO>>

Replace EOP sensor. Refer to Exploded View.

P0524 Engine Oil Pressure Nissan Pathfinder Fifth generation

DTC Description

DTC DETECTION LOGIC

DTC		CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0524	00	ENGINE OIL PRESSURE (Engine oil pressure too low)	Diagnosis condition	Engine speed: 1,000 rpm or more
			Signal (terminal)	Engine oil pressure sensor signal
			Threshold	An EOP sensor signal voltage applied to ECM remains lower than the specified value
			Diagnosis delay time	10 seconds or more

POSSIBLE CAUSE

• Decrease in engine oil pressure

• Decrease in engine oil level

• Engine oil condition

• EOP sensor

• Cause of engine oil consumption

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

CAUTION:

If “Diagnosis Procedure” is unfinished, be sure to perform Step 3 and 4.

PRECONDITIONING-1

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TEST CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>>

GO TO 2.

PRECONDITIONING-2

Is “Diagnosis Procedure” of DTC P0524 finished?

YES>>

GO TO 3.

NO>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and warm it up to normal operating temperature.

2. Maintain the following conditions for about 10 consecutive seconds.

   Selector lever	P or N position
   Engine coolant temperature	70°C (158°F) or more
   Engine speed	1,000 rpm or more

   NOTE:

   With engine speed set around 4,000 rpm, the phenomenon can be reproduced more easily.

3. Check DTC.

Is DTC P0524 detected?

YES>>

Proceed to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

CHECK ENGINE OIL LEVEL

Check engine oil level. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Proceed to Diagnosis Procedure.

CHECK ENGINE OIL PRESSURE

With CONSULT

1. Turn ignition switch ON.

2. On CONSULT screen, select “ENGINE”>>“Data Monitor”.

3. Start the engine and check that “EOP SENSOR” changes, according to engine speeds.

   Monitor item	Condition		Value
   EOP SENSOR	Engine: After warming up Selector lever: P or N Air conditioner switch: OFF No load	Idle	1.570 – 1.900 V
   		2,000 rpm	1.610 – 2.120 V

Without CONSULT

Check engine oil pressure. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Proceed to Diagnosis Procedure.

Diagnosis Procedure

CHECK ENGINE OIL LEVEL

1. Turn ignition switch OFF.

2. Check engine oil level. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK ENGINE OIL PRESSURE

With CONSULT

1. Turn ignition switch ON.

2. On CONSULT screen, select “ENGINE”>>“Data Monitor”.

3. Start the engine and check that “EOP SENSOR” changes, according to engine speeds.

   Monitor item	Condition		Value
   EOP SENSOR	Engine: After warming up Selector lever: P or N Air conditioner switch: OFF No load	Idle	1.570 – 1.900 V
   		2,000 rpm	1.610 – 2.120 V

Without CONSULT

Check engine oil pressure. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Check oil pump. Refer to Removal and Installation.

CHECK EOP SENSOR

Check EOP sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

CHECK ENGINE OIL LEAKAGE

Check engine oil leakage. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace error-detected parts.

CHECK CAUSE OF ENGINE OIL CONSUMPTION

Check the following item.

Step	Inspection item	Equipment	Standard	Reference
1	PCV valve	Inspection
2	Exhaust front tube	Visual	No blocking No abnormal sounds	—
3	Oil pump	Visual	No blocking No abnormal sounds	—
4	Piston Piston pin Piston ring	Piston to piston pin oil clearance Piston ring side clearance Piston ring end gap		Inspection
5	Cylinder block	Cylinder block top surface distortion Piston to cylinder bore clearance		Inspection

>>

Repair or replace error-detected parts.

Component Inspection

CHECK EOP SENSOR

1. Turn ignition switch OFF.

2. Disconnect EOP sensor harness connector.

3. Check resistance between EOP sensor connector terminals.

   EOP sensor		Condition	Resistance
   Terminal
   1	2	None	4 – 10 kΩ
   	3		2 – 8 kΩ
   2	3		1 – 3 kΩ

Is the inspection result normal?

YES>>

INSPECTION END.

NO>>

Replace EOP sensor. Refer to Exploded View.