The MAF reading does not match what the computer expects for the engine load. The driver may notice hesitation, weak power or poor idle.
Likely causes, most common first
- Dirty MAF sensor
- Air leak after the sensor
- Clogged air filter
- Faulty MAF sensor
Parts usually involved
- MAF sensor
- Air filter
- Intake ducts
Test before you replace
Inspect the air intake for leaks and compare live MAF values with the expected figures for that engine.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.