OBD-II code · Powertrain (generic)
P0294 Cylinder 12 Injector A Circuit Low
Cylinder 12 injector A control voltage below expected range. A flow-deviating injector throws off cylinder balance — adjacent cylinders run leaner/richer to compensate, often masking the root cause until the trim limit is hit.
Is it safe to drive with P0294?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWiring shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Injector Cyl12, Injector Wiring
Related codes
- P0276Cylinder 6 Injector A Circuit Low
- P0279Cylinder 7 Injector A Circuit Low
- P0282Cylinder 8 Injector A Circuit Low
- P0285Cylinder 9 Injector A Circuit Low
- P0288Cylinder 10 Injector A Circuit Low
- P0291Cylinder 11 Injector A Circuit Low
- P21DBCylinder 1 Injector B Circuit Low
- P21DECylinder 2 Injector B Circuit Low
- P21E0Cylinder 3 Injector B Circuit Low
- P21E2Cylinder 4 Injector B Circuit Low
- P21E4Cylinder 5 Injector B Circuit Low
- P21E6Cylinder 6 Injector B Circuit Low
- P0292Cylinder 11 Injector A Circuit High
- P0293Cylinder 11 Contribution/Balance
- P0295Cylinder 12 Injector A Circuit High
- P0296Cylinder 12 Contribution/Balance
- P0297Vehicle Overspeed Condition
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.