P0101
PowertrainFuel Air Meteringmoderate severityMass Air Flow (MAF) Circuit Range/Performance
What P0101 Means
The MAF sensor reading is outside the expected range for the current engine operating conditions.
Symptoms
- Check Engine Light
- Poor fuel economy
- Hesitation
- Rough idle
- Stalling
Common Causes
- Dirty MAF sensor
- Intake air leak
- Restricted air filter
- Faulty MAF sensor
- Exhaust leak near O2 sensor
Diagnostic Steps
- Compare MAF reading to spec at idle and 2500 RPM
- Check for vacuum leaks
- Inspect air filter
- Clean MAF sensor
- Check for exhaust leaks
Where to start: Clean or replace MAF sensor. Repair any intake leaks.
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