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P0101 Mass Air Flow (MAF) Sensor Range/Performance
What it means
The MAF sensor's airflow reading doesn't make sense compared to other sensors like throttle position and RPM.
Severity: Moderate
Can I drive it? Usually drivable, but may hesitate, stall, or get poor mileage.
Common causes (most likely first)
- Dirty MAF sensor
- Air leak after the MAF (intake boot cracks)
- Clogged air filter
- Faulty MAF sensor
Likely fixes
- Clean MAF with MAF cleaner
- Replace air filter
- Inspect intake boot
- Replace MAF sensor
DIY parts cost
$10–$250
Approximate estimate
Shop repair cost
$100–$450
Approximate estimate, parts + labor
DIY difficulty
Easy
Varies by vehicle
Cost ranges are rough, approximate U.S. estimates and vary widely by vehicle, region, and parts brand. Always confirm the diagnosis before buying parts.
Parts you may need
- MAF sensor cleanerCheck price
- MAF sensorCheck price
- Engine air filterCheck price
- Intake bootCheck price
Affiliate links are placeholders. Verify fitment for your year/make/model.