Inspection Procedure

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.

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 the ON position.
   3. Turn the tester on.
   4. On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA INFO / CURRENT CODES.
   5. Read the DTCs.

      Result 

      DTCS OUTPUT RESULT REFERENCE
      
      

      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  DTC CHART