P0068 - MAP/MAF - Throttle Position Correlation
The PCM found an airflow or pressure signal that does not agree with throttle position or other sensor inputs, which usually points to a sensor, wiring, or air-leak problem.
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Common Next Steps
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Compare trims at idle, 2500 RPM, and cruise before pricing sensors.
Check intake boots, PCV hoses, and post-MAF leak paths.
Inspect MAF contamination and airflow data after intake leaks are considered.
Look for cracked ducts, loose clamps, and unmetered air after the MAF.
Related Inspection
Code Overview
The PCM found an airflow or pressure signal that does not agree with throttle position or other sensor inputs, which usually points to a sensor, wiring, or air-leak problem.
Common Causes
- Dirty or failing MAP/MAF sensor
- Vacuum leak or intake leak
- Wiring or connector issue
- Throttle-body or airflow problem
Diagnostic Steps
- Inspect the intake duct and vacuum hoses for leaks
- Compare MAP and MAF readings to RPM and throttle angle
- Clean the sensor only if the service procedure allows it
- Check the connector and sensor ground before replacing the sensor
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Next Steps
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