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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System (SFI) - Diagnostics (2AZ-FE)) >> DTC P0101: Mass Or Volume Air Flow Circuit Range/Performance Problem >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

HINT:

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, 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 OTHER DTC OUTPUT (IN ADDITION TO DTC P0101) 
    1. Read the DTC using the hand-held tester or the OBD II scan tool.

      Result: 

      DTC OUTPUT RESULT

      Display (DTC Output) Proceed to
      P0101 and other DTCs are output A
      Only P0101 is output B

      HINT:

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

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