P22F6 code meaning
Cylinder 8 Alternative Fuel Injector Control Circuit Low
Powertrain system Generic code P22xx codes Check engine light
What P22F6 means
Cylinder 8 is the last cylinder with a generic gas injector code; beyond it the Altech-Eco/TransEco table for the Ford 6.8 V10 switches to manufacturer codes. P22F6 reports a control line for the cylinder 8 valve that is too low. That table counts a short to ground as well as an open line here, with MIL on bi-fuel vehicles only, and Ford's 2014 code list includes the code with MIL. For the driver the effect depends on the fault: a grounded line may keep gas flowing into cylinder 8 and enrich it, a broken one shuts it off. Either way the misfire shows up only in gas mode, which helps separate it from a gasoline injector fault such as P0208. Repair starts with the plug and harness at that valve.
P22F6 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 P22F6
- Check engine light on (bi-fuel versions)
- Misfire on cylinder 8 only in gas mode
- Gas mode not available
Common causes of P22F6
- Most likelyCylinder 8 control wire grounded through damaged insulation
- PossibleOpen wire or unplugged injector (reported as Low)
- PossibleCylinder 8 gas injector coil 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 P22F6 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). |
| F6 | The exact fault in that area. |
What to do next
- Note P22F6 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 P22F6
What does P22F6 mean?
P22F6 means "Cylinder 8 Alternative Fuel Injector Control Circuit Low". Cylinder 8 is the last cylinder with a generic gas injector code; beyond it the Altech-Eco/TransEco table for the Ford 6.8 V10 switches to manufacturer codes. It is a generic code, so it means the same on every make.
Is it safe to drive with P22F6?
Drive gently and only to a workshop. With P22F6 the car can go into limp mode (reduced power) to protect itself.
Will P22F6 fail an emissions test?
Yes, it can. P22F6 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 P22F6 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P22F6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.