P22F1 code meaning
Cylinder 7 Alternative Fuel Injector Control Circuit/Open
Powertrain system Generic code P22xx codes Check engine light
What P22F1 means
A general circuit or open-wire code for the gas injector of cylinder 7, which only exists on V8 and larger engines. No manufacturer documents this code publicly. Ford and the Altech-Eco/TransEco CNG system for Ford V8 and V10 trucks report an open circuit at this valve under the Low code P22F2 instead, which CARB allows: for output circuit faults a maker need not store separate codes for open, shorted low and shorted high. A manufacturer using P22F1 would set it when the driver sees no load current from the cylinder 7 valve, typically a severed wire, unplugged connector or burnt coil. In gas mode the cylinder gets no fuel and misfires; bi-fuel engines normally revert to gasoline.
P22F1 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P22F1
- Misfire on cylinder 7 in gas mode
- Fallback to gasoline on bi-fuel vehicles
- Check engine light on
Common causes of P22F1
- Most likelyPlug of the cylinder 7 gas injector loose or left off after service
- PossibleBroken control or supply wire in the gas harness
- PossibleGas injector coil open internally
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 P22F1 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). |
| F1 | The exact fault in that area. |
What to do next
- Note P22F1 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 P22F1
What does P22F1 mean?
P22F1 means "Cylinder 7 Alternative Fuel Injector Control Circuit/Open". A general circuit or open-wire code for the gas injector of cylinder 7, which only exists on V8 and larger engines. It is a generic code, so it means the same on every make.
Is it safe to drive with P22F1?
Drive gently and only to a workshop. With P22F1 the car can go into limp mode (reduced power) to protect itself.
Will P22F1 fail an emissions test?
Yes, it can. P22F1 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 P22F1 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P22F1 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.