OBD-II FAULT CODE
P0103
Mass or Volume Air Flow Circuit High Input
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0103.
- Check Engine light
- Poor drivability or reduced fuel economy depending on fault
- High signal voltage
- Open ground
- Short to voltage
- Failed sensor
- Scan all modules and record freeze-frame data before clearing codes
- Check battery voltage and related fuses
- Check sensor ground and signal circuit for short to voltage
- Repair ground/signal circuit or replace confirmed faulty sensor
Related Codes
Need more help?
Search manuals, wiring diagrams and technical service bulletins.
Not sure what to do next?
Get step-by-step instructions and professional repair information.
Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.