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Home >> Toyota >> 2004 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) - Diagnostics (1ZZ-FE) >> DTC P0101: Mass Or Volume Air Flow Circuit Range/Performance Problem >> Inspection Procedure
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Inspection Procedure

NOTE:

Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

  1. CHECK OTHER DTC OUTPUT(IN ADDITION TO DTC P0101) 
    1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
    2. Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.
    3. Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".
    4. Read the DTCs.

      Result: 

      DTC OUTPUT

      Display (DTC output) Proceed to
      P0101 and other DTCs A
      P0101 B
      NOTE:

      If any other codes besides P0101 are output, perform the troubleshooting for those DTCs first.

    1. B: REPLACE MASS AIR FLOW SENSOR 
    2. A: GO TO RELEVANT DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART  ) 
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