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P0068 - Manifold Absolute Pressure (Map)/Mass Air Flow (MAF)

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DTC DESCRIPTION P0068 - MANIFOLD ABSOLUTE PRESSURE (MAP)/MASS AIR FLOW (MAF)

Description:  The PCM monitors a vehicle operation rationality check by comparing sensed throttle position to mass airflow readings. This continuous memory DTC sets when during a key ON, engine running (KOER) self-test, the comparison of the throttle position (TP) sensor and MAF sensor readings are not consistent with the calibrated load values.
Possible Causes: 
  • Air leak at any connection or line of the intake air system components before or after the electronic throttle body (ETB)
  • Leak in the positive crankcase ventilation (PCV) system
  • TP sensor not seated correctly
  • Damaged MAF sensor
  • Damaged TP sensor
Diagnostic Aids:  An intake air system leak at a hose, line or connection of any intake air system or PCV system component may cause this DTC to set.
Diagnose any MAF or TP DTCs first.
If the throttle plate is closed and the LOAD PID is greater than 55%, or with the throttle plate at wide open throttle (WOT) with the LOAD PID less than 30% indicates a concern is present.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test DV .
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