What usually causes it
- A dirty air flow sensor
- An air leak in the intake hose after the sensor
- A clogged air filter
- A failing air flow sensor
P0101Starts at: OK to drive, fix when convenient
Air flow sensor (MAF) reading is out of range
The mass air flow (MAF) sensor measures how much air goes into the engine. Its reading does not fit what the engine is doing.
Check this first
Check that the air filter is clean and the big air hose is tight with no cracks. A spray made to clean MAF sensors sometimes fixes a dirty one.
What to watch for
- Stalling, or hesitation when you press the gas
- Black smoke or poor gas mileage
- A flashing check engine light, which means a bad misfire
Can I keep driving?
We rate P0101 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
Quick answers about P0101
What does P0101 mean?
Air flow sensor (MAF) reading is out of range. The mass air flow (MAF) sensor measures how much air goes into the engine. Its reading does not fit what the engine is doing.
Can I keep driving with P0101?
We rate P0101 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
What usually causes P0101?
The most common causes, in order: A dirty air flow sensor; An air leak in the intake hose after the sensor; A clogged air filter; A failing air flow sensor.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.