ECD SYSTEM (w/ EGR Cooler Bypass Valve), Diagnostic DTC:P0101

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

DESCRIPTION

The mass air flow meter uses a platinum hot wire. The mass air flow meter consists of a platinum hot wire, a temperature sensor and a control circuit installed in a plastic housing. The mass air flow meter hot wire and temperature sensor (located in the intake air by-pass of the housing) detect changes in the intake air temperature.

The hot wire is maintained at the predetermined temperature by controlling the current flow through the hot wire. This current flow is then related as the output voltage of the mass air flow meter.

The circuit is constructed so that the platinum hot wire and temperature sensor provide a bridge circuit, with the power transistor controlled so that the potential of A and B remains equal to maintain the predetermined temperature.

A01KGJ0E01
DTC No. DTC Detection Condition Trouble Area
P0101

After engine is warmed up, condition (a) continues for more than 10 seconds with engine speed at 1,500 rpm or more.

(2 trip detection logic)

(a) Mass air flow meter range less than 0.33 g/sec

 Mass air flow meter

After engine is warmed up, condition (b) continues for more than 10 seconds with engine speed at 1,250 rpm or less.

(2 trip detection logic)

(b) Mass air flow meter range more than 200 g/sec

INSPECTION PROCEDURE

PROCEDURE


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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the tester on.

    3. Select the following menus: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      Result
      Display (DTC Output) Proceed to
      P0101 and other DTCs A
      P0101 B

      Tech Tips

      If codes other than P0101 are output, perform troubleshooting for those DTCs first.


    B

    REPLACE MASS AIR FLOW METER Click here

    A

    GO TO DTC CHART Click here