P22E4 code meaning
Cylinder 3 Alternative Fuel Injector Control Circuit Range/Performance
Powertrain system Generic code P22xx codes Check engine light
What P22E4 means
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.
P22E4 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P22E4
- Malfunction indicator lamp on
- Intermittent cylinder 3 misfire on gas
- Rising gas consumption
Common causes of P22E4
- Most likelyArmature of the cylinder 3 gas injector gummed up by oil or debris
- PossibleInjector coil aged or overheated, resistance out of range
- Less likelyWeak driver output or poor supply ground
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alternative fuel injector
What each part of P22E4 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 2 | Area: fuel and air metering (injector circuit). |
| E4 | The exact fault in that area. |
What to do next
- Note P22E4 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P22E4
What does P22E4 mean?
P22E4 means "Cylinder 3 Alternative Fuel Injector Control Circuit Range/Performance". P22E4 points to a cylinder 3 gas injector whose circuit works but whose electrical behaviour does not match the command. It is a generic code, so it means the same on every make.
Is it safe to drive with P22E4?
Drive gently and only to a workshop. With P22E4 the car can go into limp mode (reduced power) to protect itself.
Will P22E4 fail an emissions test?
Yes, it can. P22E4 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P22E4 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P22E4 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.