Severity: Moderate
Drivable, but it can cause more damage or poor economy. Get it checked within days.
What P0101 means
The mass airflow sensor reading does not make sense compared to engine load and throttle position.
Symptoms
- Hesitation
- Poor fuel economy
- Possible lean or rich codes
Common causes
Most likely first
- 1Dirty MAF sensor element
- 2Air leak between MAF and throttle body
- 3Clogged air filter
- 4Aftermarket oiled air filter contaminating the sensor
How we diagnose it
- Inspect intake duct and clamps
- Compare MAF grams/second to expected at idle and wide open throttle
- Clean the sensor with MAF-safe cleaner only
Every vehicle sets codes under its own conditions. We check the factory diagnostic steps and service bulletins for your VIN, so the repair targets the actual cause.