P22E0 code meaning
Cylinder 2 Alternative Fuel Injector Control Circuit Range/Performance
Powertrain system Generic code P22xx codes Check engine light
What P22E0 means
P22E0 covers a cylinder 2 gas injector circuit that passes the plain open and short checks yet responds outside its expected window. California's OBD regulation asks for output components to be checked not only for circuit faults but also for a proper functional response; for alternate-fueled vehicles from 2004 to 2018 the gasoline rules applied unchanged, and from 2019 the maker submits its own monitoring plan. The Ford patent US 8,161,946 gives an example of such a functional check for an injector fed by an extra driver. No maker publishes P22E0 itself. Typical triggers are a sluggish or partly stuck injector, a coil past its specification or a driver that cannot deliver the needed current. Cylinder 2 then runs unevenly on gas.
P22E0 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 P22E0
- Malfunction indicator lamp on
- Uneven idle on gas, cylinder 2 misfire counts
- Fuel trim drifts in gas mode
Common causes of P22E0
- Most likelyCylinder 2 gas injector opening or closing too slowly
- PossibleCoil resistance of the injector out of tolerance
- Less likelyDriver stage or supply unable to provide the required current
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 P22E0 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). |
| E0 | The exact fault in that area. |
What to do next
- Note P22E0 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 P22E0
What does P22E0 mean?
P22E0 means "Cylinder 2 Alternative Fuel Injector Control Circuit Range/Performance". P22E0 covers a cylinder 2 gas injector circuit that passes the plain open and short checks yet responds outside its expected window. It is a generic code, so it means the same on every make.
Is it safe to drive with P22E0?
Drive gently and only to a workshop. With P22E0 the car can go into limp mode (reduced power) to protect itself.
Will P22E0 fail an emissions test?
Yes, it can. P22E0 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 P22E0 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P22E0 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.