Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0101 MAF sensor
DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC P0101 is displayed with other DTC, first perform the trouble diagnosis for other DTC.

DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0101 MAF SEN/CIRCUITB1 [Mass air flow (MAF) sensor circuit range/performance]
  • A high voltage from the sensor is sent to ECM under light load driving condition.
  • A low voltage from the sensor is sent to ECM under heavy load driving condition.
  • Harness or connectors (MAF sensor circuit is open or shorted.)
  • Intake air leaks
  • MAF sensor
  • EVAP control system pressure sensor
  • Intake air temperature sensor

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.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and warm it up to normal operating temperature.
  2. Drive the vehicle for at least 5 seconds under the following conditions: CAUTION: Always drive vehicle at safe speed.

PERFORM DTC CONFIRMATION PROCEDURE

NOTE:

  • The gear must be fixed while driving the vehicle.
  • Keep the accelerator pedal as steady as possible during cruising.

    3.   Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Proceed to EC178, "Diagnosis Procedure".

NO >> INSPECTION END

    More about «P0101 MAF sensor»:

    DTC Logic

    Diagnosis Procedure

    Component Inspection

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