Nissan Rogue (T33) 2021-Present Service Manual: P0031 A/f Sensor 1 Heater

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P0031 A/f Sensor 1 Heater

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0031 00

HO2S1 HTR (B1)

(HO2S heater control circuit low bank 1 sensor 1) 		Diagnosis condition Engine running at idle
 
 
 
 
Signal (terminal) A/F sensor 1 heater signal
Threshold An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater
Diagnosis delay time —
 
 
 
 

POSSIBLE CAUSE

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

  • The A/F sensor 1 heater

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 that battery voltage is more than between 11 V at idle.

>>

GO TO 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 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 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.

    + − Voltage
    A/F sensor 1
    Connector Terminal
    F18 4 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

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.

    + − Continuity
    A/F sensor 1 ECM
    Connector Terminal Connector Terminal
    F18 3 F72 6 Existed

  4. Also check harness for short to ground and 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.

CHECK A/F SENSOR 1 HEATER

Check the A/F sensor 1 heater. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 4.

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

Replace malfunctioning air fuel ratio (A/F) sensor 1. Refer to Exploded View.

>>

INSPECTION END

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