Fault-Code Library · Air metering

P0068: Throttle body airflow correlation

Throttle position, manifold pressure, and measured airflow do not agree with one another.

Fault-Code Library

Common symptoms

  • •Unstable idle
  • •Reduced power
  • •Poor throttle response
  • •Stalling

Likely causes

  • •Intake or boost leak
  • •Dirty throttle body
  • •MAP or MAF plausibility fault
  • •Throttle adaptation issue

First checks

  • •Smoke-test the intake
  • •Compare throttle, MAP, and MAF live data
  • •Inspect and adapt the throttle body where required

Important

Correlation codes usually require system-level diagnosis rather than replacing the first sensor named by a scanner.

A fault code identifies a detected condition, not a failed part. Confirm manufacturer-specific subcodes and live data.

Inspect first

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