ECD SYSTEM, Diagnostic DTC:P0101

DTC Code DTC Name
P0101 Mass Air Flow Circuit Range / Performance Problem

DESCRIPTION

Refer to DTC P0100 Click here.

DTC No. DTC Detection Condition Trouble Area
P0101

Air flow rate from mass air flow meter sub-assembly is out of specified threshold under the following conditions (2 trip detection logic):


  • Engine speed is idling or more than 2500 rpm

  • Engine coolant temperature is 70°C (158°F) or higher

 Mass air flow meter sub-assembly

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0101)


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / DTC.

    6. Read the DTCs.

      Result
      Result Proceed to
      DTC P0101 is output A
      DTC P0101 and other DTCs are output B

    B

    GO TO DTC CHART Click here

    A

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here