OBD-II code · Powertrain (generic)
P0104 Mass or Volume Air Flow Circuit Intermittent
The ECU detects intermittent signal dropouts or noise on the mass air flow (MAF) sensor circuit. The fault is not constantly present, suggesting a loose connection, intermittent wiring break, or a failing sensor under specific conditions (vibration, temperature).
Is it safe to drive with P0104?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyMAF connector loose or corroded
- PossibleWiring chafed against engine components
- PossibleMAF sensor failing intermittently
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 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, Maf Connector, Maf Wiring
Related codes
- P0101Mass or Volume Air Flow Circuit Range/Performance
- P0102Mass or Volume Air Flow Circuit Low Input
- P0103Mass or Volume Air Flow Circuit High Input
- P0105Manifold Absolute Pressure / Barometric Pressure Circuit Malfunction
- P0106Manifold Absolute Pressure Sensor Range/Performance
- P0107Manifold Absolute Pressure Sensor Low Input
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.