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Air intakeSeverity Medium: diagnose soon

P0068MAP/MAF – Throttle Position Correlation

What it means

The airflow the ECU calculates from the throttle position doesn't match the airflow measured by the MAF or MAP sensor. Air is getting in where it shouldn't, or one of the sensors is wrong.

Symptoms

  • Rough or high idle
  • Hesitation or limp mode
  • Stalling when coming to a stop

Common causes

  • Vacuum leak after the throttle body
  • Dirty throttle body or a throttle that needs relearning
  • Faulty MAF or MAP sensor
  • Faulty throttle position sensor

What to check first

  1. Compare MAF g/s, MAP and throttle angle at idle with known-good values
  2. Smoke-test the intake for leaks
  3. Clean the throttle body and run the relearn procedure
Can I drive with P0068? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

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P0068: questions and answers

What does P0068 mean?

P0068: MAP/MAF – Throttle Position Correlation. The airflow the ECU calculates from the throttle position doesn't match the airflow measured by the MAF or MAP sensor. Air is getting in where it shouldn't, or one of the sensors is wrong.

What are the symptoms of P0068?

Rough or high idle. Hesitation or limp mode. Stalling when coming to a stop.

What causes P0068?

Vacuum leak after the throttle body. Dirty throttle body or a throttle that needs relearning. Faulty MAF or MAP sensor. Faulty throttle position sensor.

How do you diagnose P0068?

1. Compare MAF g/s, MAP and throttle angle at idle with known-good values 2. Smoke-test the intake for leaks 3. Clean the throttle body and run the relearn procedure

Can I drive with P0068?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.