Nissan Rogue manuals

Nissan Rogue Service Manual: P0127 IAT sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition
P0127 IAT SENSOR-B1 (Intake air temperature too high) Rationally incorrect voltage from the sensor is sent to ECM, compared with the voltage signal from engine coolant temperature sensor.

POSSIBLE CAUSE

FAIL-SAFE

Not applicable

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: This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1.  Wait until engine coolant temperature is less than 96°C (205°F)

NOTE: Perform the following steps before engine coolant temperature is above 96°C (205°F).

  1.  Turn ignition switch ON.
  2.  Select “DATA MONITOR” mode of “ENGINE” using CONSULT
  3.  Start engine.
  4.  Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds.

    CAUTION: Always drive vehicle at a safe speed.

  5.  Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

Is 1st trip DTC detected? YES >> Proceed to EC-221, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

Is the inspection result normal? YES >> GO TO 2.

NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to EM-24, "Exploded View".

2.CHECK INTERMITTENT INCIDENT

Refer to GI-41, "Intermittent Incident".

>> INSPECTION END

Component Inspection

1.CHECK INTAKE AIR TEMPERATURE SENSOR

  1.  Turn ignition switch OFF.
  2.  Disconnect mass air flow sensor harness connector and reconnect it again.
  3.  Turn ignition switch ON.
  4.  Select “DATA MONITOR” mode with CONSULT.
  5.  Check that “INT/A TEMP SEN” indicates as per following condition.
Monitor item Condition Value (Approx.)
INT/A TEMP SEN Temperature [°C (°F)] 25 (77) 1.9 - 2.1 (V)

Is the inspection result normal? YES >> INSPECTION END

NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to EM-24, "Exploded View".

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