P22F5 code meaning
Cylinder 8 Alternative Fuel Injector Control Circuit/Open
Powertrain system Generic code P22xx codes Check engine light
What P22F5 means
Open-circuit code for the gas injector of cylinder 8. No manufacturer documents this code publicly. In the two manufacturer-side lists found, the Ford overview from 2014 and TransEco's sheet for gas-converted Ford V8 and V10 trucks, cylinder 8 has only P22F6 and P22F7, and the TransEco table explicitly assigns an open line to P22F6. CARB permits this shortcut for output circuits. Where P22F5 is used, the module would flag it when no current flows through the cylinder 8 valve after it is commanded on. Typical findings are a pulled or corroded plug at the rear of the bank, a wire broken by engine movement or an internally open coil. That cylinder then gets no gas, while gasoline mode stays usable on bi-fuel trucks.
P22F5 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 P22F5
- Cylinder 8 misfire whenever the engine runs on gas
- Change to gasoline on bi-fuel vehicles
- Check engine light on
Common causes of P22F5
- Most likelyCylinder 8 injector plug corroded or disconnected
- PossibleWire fatigued at a flex point of the gas harness
- PossibleCoil of the cylinder 8 gas valve open
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 P22F5 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). |
| F5 | The exact fault in that area. |
What to do next
- Note P22F5 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 P22F5
What does P22F5 mean?
P22F5 means "Cylinder 8 Alternative Fuel Injector Control Circuit/Open". Open-circuit code for the gas injector of cylinder 8. It is a generic code, so it means the same on every make.
Is it safe to drive with P22F5?
Drive gently and only to a workshop. With P22F5 the car can go into limp mode (reduced power) to protect itself.
Will P22F5 fail an emissions test?
Yes, it can. P22F5 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 P22F5 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P22F5 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.