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HOMESERVICE MANUALSNISSAN-DATSUN2024FRONTIER SL, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (DTC/CIRCUIT DIAGNOSIS) (6 OF 6)DTC/CIRCUIT DIAGNOSISDTC P2237: A/F SENSOR 1DTC CONFIRMATION PROCEDURE
2024 Nissan-Datsun Frontier SL, RWD

DTC Confirmation Procedure

2024 Nissan-Datsun Frontier SL, RWDSECTION 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 11 V at idle.

    >>

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A 
    1. Start engine and warm it up to normal operating temperature.
    2. Let engine idle for 2 minutes.
    3. Check 1st trip DTC.

    Is DTC P2237 detected?

    >>

    Proceed to Diagnosis Procedure .

    >>

    With CONSULT : GO TO 3.

    >>

    Without CONSULT : GO TO 7.

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

    Does the indication fluctuate around 2.2 V?

    >>

    GO TO 4.

    >>

    Proceed to Diagnosis Procedure .

  4. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-I 

    SYMBOL With CONSULT

    1. On CONSULT screen, select "ENGINE">>"DTC Work Support">>"A/F SEN1">>"A/F SEN1 (B1) P1276" (for DTC P2237).
    2. Touch "START".
    3. When the following conditions are met, "TESTING" will be displayed on the CONSULT screen.
      ENG SPEED 1, 000 - 3, 200 RPM
      VHCL SPEED SE More than 64 km/h (40 mph)
      B/FUEL SCHDL 1.0 - 10.0 msec
      Selector lever D position

      If "TESTING" is not displayed after 20 seconds, retry from step 2.

      CAUTION:

      Always drive vehicle at a safe speed.

    Is "TESTING" displayed on CONSULT screen?

    >>

    GO TO 5.

    >>

    Check A/F sensor 1 function again. GO TO 3.

  5. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II 

    Release accelerator pedal fully.

    NOTE: SYMBOL Never apply brake when releasing the accelerator pedal.

    Which does "TESTING" change to?

    COMPLETED>>

    GO TO 6.

    OUT OF CONDITION>>

    Retry DTC CONFIRMATION PROCEDURE. GO TO 4.

  6. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III 

    Touch "SELF-DIAG RESULT".

    Is "OK" displayed on CONSULT screen?

    >>

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

    >>

    Confirmation after repair: INSPECTION END

    >>

    Proceed to Diagnosis Procedure .

  7. PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B 
    NOTE: SYMBOL Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a 1st trip DTC might not be confirmed.

    SYMBOL With GST

    1. Start engine and warm it up to normal operating temperature.
    2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.
    3. Shift the selector lever to D position, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
      CAUTION:

      Always drive vehicle at a safe speed.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.