P22E7 code meaning
Cylinder 4 Alternative Fuel Injector Control Circuit High
Powertrain system Generic code P22xx codes Check engine light
What P22E7 means
P22E7 says the control circuit of the cylinder 4 gas injector reads high. TransEco Energy's fault table blames a short to power and lights the MIL for bi-fuel use; Ford's 2014 code list also marks P22E7 as a MIL code. The injector then cannot open and cylinder 4 misfires lean whenever gas is selected. Timing matters for diagnosis: GM's 2015 bi-fuel Impala starts on gasoline below about -20 °C and only moves to CNG once coolant reaches 50 °C, so on such cars the fault may appear only after warm-up. Check the wire for contact with a live feed and measure the injector coil for internal shorts. P22E6 is the low side; P0271 is the corresponding code for the gasoline injector of cylinder 4.
P22E7 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P22E7
- Malfunction indicator lamp on
- Cylinder 4 misfire only after the switch to gas
- Reduced power in gas mode
Common causes of P22E7
- Most likelyCylinder 4 control wire in contact with a 12 V circuit
- PossibleCylinder 4 injector coil with internal short
- Less likelyOutput stage of the controlling module defective
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 P22E7 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). |
| E7 | The exact fault in that area. |
What to do next
- Note P22E7 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 P22E7
What does P22E7 mean?
P22E7 means "Cylinder 4 Alternative Fuel Injector Control Circuit High". P22E7 says the control circuit of the cylinder 4 gas injector reads high. It is a generic code, so it means the same on every make.
Is it safe to drive with P22E7?
Drive gently and only to a workshop. With P22E7 the car can go into limp mode (reduced power) to protect itself.
Will P22E7 fail an emissions test?
Yes, it can. P22E7 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 P22E7 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P22E7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.