Nissan Rogue (T33) 2021-Present Service Manual: P0038 Ho2s2 Heater

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P0038 Ho2s2 Heater

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0038 00

HO2S2 HTR (B1)

(HO2S heater control circuit high bank 1 sensor 2) 		Diagnosis condition —
Signal (terminal) Heated oxygen sensor 2 heater signal
Threshold An excessively high voltage signal is sent to ECM through the heated oxygen sensor 2 heater
Diagnosis delay time —

POSSIBLE CAUSE

  • Harness or connectors (The heated oxygen sensor 2 heater circuit is shorted.)

  • Heated oxygen sensor 2 heater

FAIL-SAFE

Engine Control System

Not applicable

Stop/Start System

When a DTC is detected, the stop/start indicator lamp blinks slowly and the stop/start system operation is prohibited.

When ECM detects error while operating the stop/start system, ECM restarts the engine.

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 11 V at idle.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Turn ignition switch ON and select “DATA MONITOR” mode of “ENGINE” using CONSULT.

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

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

  4. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

  5. Let engine idle for 1 minute.

  6. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

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 HO2S2 POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.

  2. Disconnect heated oxygen sensor 2 (HO2S2) harness connector.

  3. Turn ignition switch ON.

  4. Check the voltage between HO2S2 harness connector and ground.

    + − Voltage
    HO2S2
    Connector Terminal
    F67 4 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace error-detected parts.

CHECK HO2S2 OUTPUT SIGNAL CIRCUIT

  1. Turn ignition switch OFF.

  2. Disconnect ECM harness connector.

  3. Check the continuity between HO2S2 harness connector and ECM harness connector.

    + − Continuity
    HO2S2 ECM
    Connector Terminal Connector Terminal
    F67 3 F71 70 Existed

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

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK HEATED OXYGEN SENSOR 2 HEATER

Check the heated oxygen sensor 2 heater. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 4.

REPLACE HEATED OXYGEN SENSOR 2

Replace heated oxygen sensor 2. Refer to Exploded View.

>>

INSPECTION END

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