DTC P0101 Mass Air Flow Circuit Range / Performance Problem: Wiring Diagram

Refer to DTC P0100  .

HINT:

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 running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA  ).

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0101) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG).
   3. Turn the tester on.
   4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

      Result 

      RESULT REFERENCE
      
      

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

   5. Read DTCs.

      HINT:

      If any DTCs other than P0101 are output, troubleshoot those DTCs first.

   B : REPLACE MASS AIR FLOW METER 

   A : GO TO  DTC CHART