OBD-II code guide
P0103 Mass Air Flow Circuit High Input
P0103 means the MAF sensor signal is higher than expected.
What it means
The computer sees airflow data that does not match expected operating conditions.
Common symptoms
- Poor acceleration
- Rough idle
- Stalling
- Poor fuel economy
- Check engine light
Likely causes
- MAF wiring fault
- Failed MAF sensor
- Intake air leak
- Contaminated sensor
- Electrical interference or poor ground
First checks
- Inspect wiring and connector pins.
- Check for intake leaks after the MAF.
- Compare live MAF readings to engine load.
- Check for related fuel trim codes.