P22E4Cylinder 3 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
- P22E4 points to a cylinder 3 gas injector whose circuit works but whose electrical behaviour does not match the command. Peak-and-hold gas injectors first draw a high opening current and then a lower holding current; Ford's patent US 8,161,946 treats an injector that stays at peak or ignores commands as degraded and reports this back to the engine computer. No maker documents P22E4 publicly. The code is distinct from pressure problems: GM's bi-fuel pickups regulate gas to roughly 896 kPa ahead of the rail, and a wrong rail pressure has its own sensor codes. Here the injector or its driver is suspect, often after oil or debris from the gas has made the armature stick. Cylinder 3 then runs unevenly on gas.
- What you may notice
- Malfunction indicator lamp on
- Intermittent cylinder 3 misfire on gas
- Rising gas consumption
- Likely causes
- LikelyArmature of the cylinder 3 gas injector gummed up by oil or debris
- PossibleInjector coil aged or overheated, resistance out of range
- RareWeak driver output or poor supply ground
- 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.