P0280Cylinder 7 Injector A Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0280 means the control wire of the cylinder 7 injector is shorted to voltage. GM detects this with the driver on: on direct injection by 25 A or more through the driver, on port injection and Duramax diesels by 0.5 Ω or less to the supply. On Ford's 6.7 diesel it means the injector's high side is shorted to its low side, reported within 0.3 s. Most systems switch the warning light on in the first trip (some GM port-injection engines and Saab's 2.0 turbo after two) and shut the affected injector off, so the cylinder misfires. Ford petrol engines report all injector circuit faults as P0201 ff instead.
- What you may notice
- Check engine light on
- Misfire and rough running, misfire code P0307
- Loss of power, rough idle
- Injector shut off, limp mode possible on diesels
- Likely causes
- LikelyControl wire of the cylinder 7 injector touching battery voltage or another supply wire
- PossibleInjector coil shorted internally (too low resistance, overcurrent)
- PossibleShort between supply and control wire in harness or connector
- 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
- Medium · Often possible to do yourself.Typical cost: €50 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.