Nissan Rogue Service Manual: P014C, P014D, P015A, P015B, A/F sensor 1

Nissan Rogue Service Manual / Engine / Engine Control System / DTC/Circuit diagnosis / P014C, P014D, P015A, P015B, A/F sensor 1

DTC Description

DTC DETECTION LOGIC

To judge malfunctions, this diagnosis measures response time of the A/F signal computed by ECM from the A/ F sensor 1 signal. The time is compensated by engine operating (speed and load), fuel feedback control constant, and the A/F sensor 1 temperature index. Judgment is based on whether the compensated time (the A/F signal cycling time index) is inordinately long or not.

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detecting condition
P014C	A/F SENSOR1 (B1) (O2 sensor slow response - rich to lean bank 1 sensor 1)	The response time of a A/F sensor 1 signal delays more than the specified time computed by ECM.
P014D	A/F SENSOR1 (B1) (O2 sensor slow response - lean to rich bank 1 sensor 1)
P015A	A/F SENSOR1 (B1) (O2 sensor delayed response - rich to lean bank 1 sensor 1)
P015B	A/F SENSOR1 (B1) (O2 sensor delayed response - lean to rich bank 1 sensor 1)

POSSIBLE CAUSE

Harness or connectors (The A/F sensor 1 circuit is open or shorted.)
A/F sensor 1

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

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

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

Do you have CONSULT? YES >> GO TO 2.

NO >> GO TO 6.

2.PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

Start engine and warm it up to normal operating temperature.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.
Let engine idle for 1 minute.
Increase the engine speed up to about 3,600 rpm and keep it for 10 seconds.
Fully release accelerator pedal and then let engine idle for about 1 minute.
Check the items status of “DATA MONITOR” as follows.

NOTE: If “PRSNT” changed to “ABSNT”, refer to EC-157, "Component Function Check".

Perform DTC confirmation procedure-1

Is “PRSNT” displayed on CONSULT screen? YES >> GO TO 4.

NO >> GO TO 3.

3.PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

Perform DTC confirmation procedure-1 again.

Is “PRSNT” displayed on CONSULT screen? YES >> GO TO 4.

NO >> Refer to EC-157, "Component Function Check".

4.PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

Wait for about 20 seconds at idle.
Check the items status of “DATA MONITOR” as follows.

NOTE: If “CMPLT” changed to “INCMP”, refer to EC-157, "Component Function Check".

Perform DTC confirmation procedure-2

Is “CMPLT” displayed on CONSULT screen? YES >> GO TO 5.

NO >> Refer to EC-157, "Component Function Check".

5.PERFORM SELF-DIAGNOSIS

With CONSULT

Check the “SELF-DIAG RESULT”.

Is any DTC detected? YES >> Proceed to EC-257, "Diagnosis Procedure".

NO >> INSPECTION END

6.CHECK AIR-FUEL RATIO SELF-LEARNING VALUE

With GST

Start engine and warm it up to normal operating temperature.
Select Service $01 with GST.
Calculate the total value of “Short term fuel trim” and “Long term fuel trim” indications.

Is the total percentage within ±15%? YES >> GO TO 8.

NO >> GO TO 7.

7.DETECT MALFUNCTIONING PART

Check the following.

Intake air leaks
Exhaust gas leaks
Incorrect fuel pressure
Lack of fuel
Fuel injector
Incorrect PCV hose connection
PCV valve
Mass air flow sensor

>> Repair or replace malfunctioning part.

8.PERFORM DTC CONFIRMATION PROCEDURE

Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
Let engine idle for 1 minute.
Increase the engine speed up to about 3,600 rpm and keep it for 10 seconds.
Fully release accelerator pedal and then let engine idle for about 1 minute.
Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-257, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.RETIGHTEN A/F SENSOR 1

Loosen and retighten the A/F sensor 1. Refer to EM-29, "Exploded View".

>> GO TO 2.

2.CHECK EXHAUST GAS LEAK

Start engine and run it at idle.
Listen for an exhaust gas leak before three way catalyst (manifold).

Check exhaust gas leak

Is exhaust gas leak detected? YES >> Repair or replace.

NO >> GO TO 3.

3.CHECK FOR INTAKE AIR LEAK

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

Is intake air leak detected? YES >> Repair or replace.

NO >> GO TO 4.

4.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE

Clear the mixture ratio self-learning value. Refer to EC-143, "Work Procedure".
Run engine for at least 10 minutes at idle speed.

Is the 1st trip DTC P0171 or P172 detected? Is it difficult to start engine? YES >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to EC-260, "DTC Description" or EC- 265, "DTC Description".

NO >> GO TO 5.

5.CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT

Disconnect A/F sensor 1 harness connector.
Turn ignition switch ON.
Check the voltage between A/F sensor 1 harness connector and ground.

Check air fuel ratio (A/F) sensor 1 power supply circuit

Is the inspection result normal? YES >> GO TO 6.

NO >> Repair or replace error-detected parts.

6.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

Check A/F sensor 1 input signal circuit

Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector and ground.

Check A/F sensor 1 input signal circuit

Also check harness for short to power.

Is the inspection result normal? YES >> GO TO 7.

NO >> Repair or replace error-detected parts.

7.CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER

Refer to EC-186, "Component Inspection".

Is the inspection result normal? YES >> GO TO 8.

NO >> GO TO 11.

8.CHECK MASS AIR FLOW SENSOR

Refer to EC-200, "Component Inspection".

Is the inspection result normal? YES >> GO TO 9.

NO >> Replace mass air flow sensor. Refer to EM-24, "Exploded View".

9.CHECK PCV VALVE

Refer to EC-498, "Inspection".

Is the inspection result normal? YES >> GO TO 10.

NO >> Repair or replace PCV valve. Refer to EC-14, "Component Parts Location".

10.CHECK INTERMITTENT INCIDENT

Perform GI-41, "Intermittent Incident".

Is the inspection result normal? YES >> GO TO 11.

NO >> Repair or replace.

11.REPLACE AIR FUEL RATIO (A/F) SENSOR 1

Replace air fuel ratio (A/F) sensor 1. Refer to EM-29, "Exploded View".

CAUTION:

Discard any sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
Before installing new sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial service tool).

>> INSPECTION END

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