Ask Andy AIP0101 Mass or Volume Air Flow Circuit Range/Performance
What it means, what causes it, and what it costs to fix.
What P0101 means
The MAF sensor measures how much air enters the engine. Its reading doesn't make sense compared with what the computer expects from throttle position and rpm.
Can I drive with P0101?
Severity: Medium. Fix soon so it doesn't turn into something bigger.
Usually drivable, but you may get hesitation, poor mileage, or stalling.
Get a diagnosis for your exact car
Tell Andy your year, make, model, and symptoms. You'll get best case, most likely, and worst case, with parts and labor costs. Free, in about 15 seconds.
Ask Andy about P0101Symptoms
- Hesitation or stumble
- Rough idle
- Poor fuel economy
- Possible stalling
Common causes
Most likely first.
- Dirty MAF sensor element (very common)
- Air leak between the MAF and the throttle body
- Clogged air filter
- Oiled MAF from an over-oiled aftermarket filter
- Failing MAF sensor
How to diagnose P0101
- Check the air filter and intake duct for cracks or loose clamps after the MAF.
- Clean the MAF with MAF-specific spray cleaner. Never touch the wire.
- Compare MAF grams/second at idle and 2,500 rpm against specs for your engine.
Tip: most US auto parts stores will read your codes for free.
Repair costs
| Clean MAF | $10 |
| Intake duct or clamp | $20–$150 |
| MAF sensor | $100–$350 installed |
Typical US prices. Your vehicle, region, and shop rates will change these.
P0101 FAQ
What does P0101 mean?
P0101 means "Mass or Volume Air Flow Circuit Range/Performance." The MAF sensor measures how much air enters the engine. Its reading doesn't make sense compared with what the computer expects from throttle position and rpm.
Can I drive with a P0101 code?
Usually drivable, but you may get hesitation, poor mileage, or stalling.
What is the most common cause of P0101?
The most common cause is: Dirty MAF sensor element. Other causes include air leak between the maf and the throttle body and clogged air filter.
How much does it cost to fix P0101?
Typical repairs run about $10 to $350 in the US, depending on the cause. Clean MAF: $10.
Still not sure what's wrong?
Describe the noise, smell, or warning light, or snap a photo. Andy is free to try.
Ask Andy free