P22DCCylinder 1 Alternative Fuel Injector Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P22DC is meant for a cylinder 1 gas injector whose circuit is electrically intact but whose response looks wrong, such as a current trace that never reaches its peak or does not fall back to the hold level, or a coil whose resistance has drifted. A Ford patent on driving a second type of injector through an interface (US 8,161,946) describes this logic: the injector counts as degraded if it ignores on and off commands or stays at peak current. No vehicle maker publishes P22DC; TransEco and Ford's 2014 list stop at Low/High. A sticking injector is a plausible trigger, which is why GM's bi-fuel pickups filter the gas through a coalescing element that keeps oil and liquids away from the injectors. Expect a misfiring cylinder 1 or a return to gasoline.
- What you may notice
- Malfunction indicator lamp on
- Uneven running in gas mode, misfire counts on cylinder 1
- Higher gas consumption or switch back to gasoline
- Likely causes
- LikelyCylinder 1 gas injector sticking from oil residue or debris in the gas
- PossibleInjector coil resistance outside its specification
- RareWeak supply voltage to the injector bank
- RareInjector of the wrong type or impedance installed
- 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: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.