Nissan Sentra manuals

Nissan Sentra Service Manual: P0031, P0032 A/F sensor 1 Heater

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P0031, P0032 A/F sensor 1 Heater

DTC Logic

DTC DETECTION LOGIC

DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause
P0031 A/F SEN 1 HTR (B1) (HO2S heater control circuit low bank 1 sensor 1) The current amperage in the A/F sensor 1 heater circuit is out of the normal range.

(An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater.)
  • Harness or connectors (A/F sensor 1 heater circuit is open or shorted.)
  • A/F sensor 1 heater
P0032 A/F SEN 1 HTR (B1) (HO2S heater control circuit high bank 1 sensor 1) The current amperage in the A/F sensor 1 heater circuit is out of the normal range.

(An excessively high voltage signal is sent to ECM through the A/F sensor 1 heater.)
  • Harness or connectors (A/F sensor 1 heater circuit is shorted.)
  • A/F sensor 1 heater

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 between 11 V at idle.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and let it idle for at least 10 seconds.
  2. Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-176, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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

  1. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
  2. Turn ignition switch ON.
  3. 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 2.

NO >> Repair or replace error-detected parts.

2.CHECK A/F SENSOR 1 HEATER OUTPUT 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. Also check harness for short to ground and short to power.

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

NO >> Repair open circuit, short to ground or short to power in harness or connectors.

3.CHECK A/F SENSOR 1 HEATER

Check the A/F sensor 1 heater. Refer to EC-177, "Component Inspection (A/F Sensor 1 Heater)".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Replace malfunctioning air fuel ratio (A/F) sensor 1. Refer to EM-30, "Exploded View".

Component Inspection (A/F Sensor 1 Heater)

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

  1. Turn ignition switch OFF.
  2. Disconnect A/F sensor 1 harness connector.
  3. Check resistance between A/F sensor 1 terminals as per the following.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace air fuel ratio (A/F) sensor 1. Refer to EM-30, "Exploded View".

P0014  EVT control
DTC Logic DTC DETECTION LOGIC NOTE: If DTC P0014 is displayed with DTC P0078, first perform trouble diagnosis for DTC P0078. Refer to EC-183, "DTC Logic". If DTC P0014 is displa ...

P0037, P0038 HO2S2 Heater
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0037 HO2 HTR (B1) (HO2S heater contro ...

Other materials:

Description
NOTICE: Trouble diagnoses indicate work procedures required to diagnose problems effectively. Observe the following instructions before diagnosing. Before performing trouble diagnoses, read the “Work Flow” in each section. After repairs, re-check that the problem has been comp ...

B0098 Front door satellite sensor RH
Description DTC B0098 FRONT DOOR SATELLITE SENSOR RH The front door satellite sensor RH is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the front door satellite sensor RH for internal failures and its circuits for communication errors. PART LOCA ...

Basic inspection
Diagnosis and repair work flow 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 occurs). Check operation condition of the function th ...

© 2014-2020 Copyright www.nisentra.com