P0212Cylinder 12 Injector A Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0212 reports an electrical fault, mainly an open circuit, in the injector circuit of cylinder 12. The engine module watches each injector output: GM flags an open circuit at an impedance of 200 kΩ or more – on direct injection and diesel engines in 10 of 20 or 5 of 10 samples and with the warning light in the first trip, on some port-injected engines only after two trips. Ford's port injection reads a fault bit from the driver chip that covers open, short to ground and short to voltage alike; Ford diesels report only the open circuit here and shorts as P0294/P0295. Cylinder 12 exists only on twelve-cylinder engines. No publicly available manufacturer document using this code was found; the description follows the documented codes for cylinders 1–10 and CARB's circuit monitoring requirement.
- What you may notice
- Check engine light on
- Misfire and rough running, misfire code P0312
- Loss of power, rough idle
- Limp mode possible on diesel and direct injection
- Likely causes
- LikelyConnector at the cylinder 12 injector loose, corroded or with a broken or pushed-back pin
- PossibleInjector coil open
- PossibleWire between module and injector open or chafed (heat, rodents)
- RareInjector supply missing (fuse, relay) – then usually several cylinders at once
- RareDriver stage in the engine module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.