P0103
Mass Air Flow Sensor High Input
System: Air/Fuel
Severity: medium
What does P0103 mean?
The DTC P0103 (Mass Air Flow Sensor High Input) is a fault code stored by the ECU when it detects a MAF high condition in the air/fuel subsystem. It is commonly seen on European and Asian vehicles using Bosch, Continental, Siemens or Denso ECUs.
Common causes of P0103
- Failed MAF (shorted)
- Wiring short to power
- Intake leak between MAF and throttle
How to fix P0103
Compare MAF reading vs calculated airflow. If MAF reads way over spec at idle, sensor failed.
Tuning approach with DaVinci Deluxe
For P0103, DaVinci Deluxe offers the following ECU map adjustments and software solutions:
- MAF max-clip limit
- Sensor rescale
Need to fix P0103 on your ECU?
DaVinci Deluxe is professional ECU tuning software trusted by 800+ workshops. Lifetime license €299, 10 minutes free trial.
See pricing Try free