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Home >> Infiniti >> 2019 >> QX60 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (5 Of 17) >> DTC/Circuit Diagnosis >> DTC P0152: A/F Sensor 1 >> DTC Confirmation Procedure
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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 

    SYMBOL With CONSULT

    1. Start engine and warm it up to normal operating temperature.
    2. On CONSULT screen, select "ENGINE">>"Data Monitor">>"A/F SEN1 (B1)" or "A/F SEN1 (B2)".
    3. Check "A/F SEN1 (B1)" or "A/F SEN1 (B2)" indication.

    Is the indication constantly approx. 5V?

    YES

    Proceed to Diagnosis Procedure .

    NO

    GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE 
    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.
    4. Restart engine.
    5. 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.
    6. Maintain the following conditions for about 20 consecutive seconds.

      ENG SPEED

      1, 000 - 3, 200 rpm

      VHCL SPEED SE

      More than 40 km/h (25 mph)

      B/FUEL SCHDL

      1.5 - 9.0 msec

      Selector lever

      Suitable position

      NOTE:
      • Keep the accelerator pedal as steady as possible during cruising.
      • If this procedure is not completed within 1 minute after restarting engine at step 4, return to step 1.
    7. Check 1st trip DTC.

    Is DTC P0132 or P0152 detected?

    YES

    Proceed to Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    NO

    Confirmation after repair: INSPECTION END