Nissan Sentra manuals

Nissan Sentra Service Manual: P0131 A/F Sensor 1

DTC Logic

DTC DETECTION LOGIC

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal is not inordinately low.

DTC No.

CONSULT screen terms (Trouble diagnosis content)

DTC detecting condition

Possible cause

P0131 A/F SENSOR1 (B1) (O2 sensor circuit low voltage bank 1 sensor 1) The A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 0 V.
  • Harness or connectors (A/F sensor 1 circuit is open or shorted.)
  • A/F sensor 1

DTC CONFIRMATION PROCEDURE

1.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 10.5 V at idle.

>> GO TO 2.

2.CHECK A/F SENSOR FUNCTION

With CONSULT


  1. Start engine and warm it up to normal operating temperature.
  2. Select “A/F SEN1 (B1)” in “DATA MONITOR” mode of “ENGINE” using CONSULT.
  3. Check “A/F SEN1 (B1)” indication.

Follow the procedure “With CONSULT” above. With GST


Follow the procedure “With CONSULT” above.

Is the indication constantly approx. 0 V? YES >> Proceed to EC-215, "Diagnosis Procedure".

NO >> GO TO 3.

3.PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT


  1. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.
  2. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine

CAUTION:

Always drive vehicle at a safe speed.

  1. Maintain the following conditions for about 20 consecutive seconds.

NOTE:


NOTE:

  1. Check 1st trip DTC.

Follow the procedure “With CONSULT” above. With GST


Follow the procedure “With CONSULT” above.

Is 1st trip DTC detected? YES >> Proceed to EC-215, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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

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

*1: Except California


*1: Except California

*2: For California

Is the inspection result normal? YES >> GO TO 3.

NO >> GO TO 2.

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

  1. Turn ignition switch OFF.
  2. Disconnect IPDM E/R harness connector.
  3. Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.

*1: Except California


*1: Except California

*2: For California

  1. 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.

3.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT

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

*1: Except California


*1: Except California

*2: For California

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

*1: Except California


*1: Except California

*2: For California


  1. Also check harness for short to power.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace error-detected parts.

4.CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to GI-39, "Intermittent Incident".

Is the inspection result normal? YES >> Replace air fuel ratio (A/F) sensor 1. Refer to EM-30, "Exploded View".

NO >> Repair or replace error-detected parts.

P0130 A/F Sensor 1
DTC Logic DTC DETECTION LOGIC To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal fluctuates according to fuel feedback control. ...

P0132 A/F SENSOR 1
DTC Logic DTC DETECTION LOGIC To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal is not inordinately high. DTC No. CONSULT ...

Other materials:

System description
Component parts Component parts location ABS actuator and electric unit (control unit) Av control unit A/c auto amp. Ecm Ipdm e/r Tcm Data link connector EPS control unit Bcm Combination meter Steering angle sensor Air bag diagnosis sensor unit System Can communi ...

Vanity mirror lamp
Removal and installation Caution: Do not attempt to separate the vanity mirror lamp from the sun visor or damage to the components may occur. Note: The vanity mirror lamp is replaced as part of the sun visor. Refer to int-40, "removal and installation". Bulb or lens replacement ...

Basic inspection
Diagnosis and repair workflow Work flow OVERALL SEQUENCE DETAILED FLOW 1.GET INFORMATION FOR SYMPTOM Get detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred). >> GO TO 2 2.CONFIRM THE SYMPTOM Try to ...

© 2014-2025 Copyright www.nisentra.com