Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester or OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.

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

      Result 

      ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0101)
      
      

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

      HINT:

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

   B: REPLACE MASS AIR FLOW METER 

   A: GO TO  DIAGNOSTIC TROUBLE CODE CHART