The MAF signal is higher than the expected range. The driver may notice rich running, black smoke or poor consumption.
Likely causes, most common first
- Short to voltage in the wiring
- Faulty MAF sensor
- Damaged connector
- Dirty sensor element
Parts usually involved
- MAF sensor
- Sensor connector
- Wiring harness
Test before you replace
Check the signal at the connector and test the wiring for a short to voltage.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.