OBD-II code · Powertrain (generic)
P0103 Mass or Volume Air Flow Circuit High Input
The MAF sensor reports an air flow value above the plausible maximum for current engine speed and load. Often indicates a sensor that is failing in a way that produces excess output, or a short to supply voltage in the signal path.
Is it safe to drive with P0103?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyMAF sensor failed
- PossibleSignal wire shorted to supply voltage
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Mass Air Flow Sensor, Mass Air Flow Sensor Wiring
Related codes
- P0100Mass or Volume Air Flow Circuit Malfunction
- P0101Mass or Volume Air Flow Circuit Range/Performance
- P0102Mass or Volume Air Flow Circuit Low Input
- P0104Mass or Volume Air Flow Circuit Intermittent
- P0105Manifold Absolute Pressure / Barometric Pressure Circuit Malfunction
- P0106Manifold Absolute Pressure Sensor Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.