P22DFCylinder 2 Alternative Fuel Injector Control 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
- P22DF indicates that the control circuit of the cylinder 2 gas injector reads high, which TransEco Energy's AFCM table attributes to a short to power; MIL on for bi-fuel use. Ford's 2014 code list likewise flags P22DF for the MIL. A line stuck at supply voltage keeps the injector closed, so cylinder 2 burns no gas and misfires lean, while running on gasoline is unaffected. On GM's 2015 bi-fuel Impala the ECM drives the CNG injectors itself and, if it sees a fuel delivery problem in one system, changes over to the other, so the driver may only notice a switch back to gasoline. A coil with internal shorts can produce the same overcurrent. P22DE is the low side; P0265 is the high-side code of the gasoline injector.
- What you may notice
- Malfunction indicator lamp on
- Cylinder 2 misfires only on gas
- Unexpected return to gasoline
- Likely causes
- LikelyCylinder 2 control wire touching a live supply wire
- PossibleInternal short in the cylinder 2 gas injector coil
- RareDriver protection in the control module tripping due to a fault
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.