The MAF signal is out of the expected range relative to other engine data.
SYMPTOMS
- Check-engine light
- Rough idle
- Hesitation
- Power loss
- Economy loss
LIKELY CAUSES
- Dirty or failing MAF
- Intake leak after the MAF
- Dirty air filter
- Intake restriction
DIAGNOSIS STEPS
- Inspect/clean the MAF
- Check for intake leaks
- Compare MAF g/s to expected
- Replace if faulty
RELATED PARTS
- MAF sensor
- Air filter
- Intake boots