P0101 Code: Mass Air Flow (MAF) Sensor Range / Performance
P0101 means the mass air flow sensor’s signal is outside the expected range for engine conditions.
- Applies to
- All OBD-II vehicles (any make or model)
- Est. repair cost
- $50 – $400
- Time to fix
- 1-3 hours
What it means
Common causes are a dirty MAF sensor, an air-intake leak, or a clogged air filter. This is a generic OBD-II powertrain code defined in the SAE J2012 standard, so it applies to virtually any 1996-or-newer OBD-II vehicle — cars, trucks, and modern fuel-injected motorcycles — from any manufacturer (Toyota, Honda, Ford and the rest). Read it with any OBD-II scanner; the meaning is the same across brands, though the exact repair can vary by engine.
Symptoms
- Check engine light on
- Rough idle, hesitation, or stalling
- Poor fuel economy or power
How to fix it
- 1
Clean the MAF and check for leaks
1. Clean the MAF sensor with MAF-specific cleaner. 2. Inspect the intake boot and air filter for leaks or blockage. 3. Replace the sensor if cleaning doesn’t help, then clear the code.
Frequently asked questions
Can cleaning fix P0101?
Often yes — a dirty MAF sensor is the most common cause. Clean it with proper MAF cleaner (not carb cleaner) before replacing anything.
Last updated July 16, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.