P22F2 code meaning
Cylinder 7 Alternative Fuel Injector Control Circuit Low
Powertrain system Generic code P22xx codes Check engine light
What P22F2 means
Low voltage on the control line of the cylinder 7 gas injector. The code appears in Ford's 2014 code list with MIL and in the installer table of the Altech-Eco/TransEco CNG kits, which on Ford's V8 (F-150 5.0) and V10 (Super Duty 6.8) engines use the PCM to drive gas valves for all cylinders; cylinders 9 and 10 of the V10 get manufacturer codes there. That table lumps a short to ground and an open line into this code, so P22F1 is not used, and shows MIL on for bi-fuel and off for dedicated CNG. A grounded line can hold the valve open and flood cylinder 7 with gas, an open line starves it. In both cases gas operation is disturbed, while a bi-fuel truck can still run on gasoline.
P22F2 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 P22F2
- Check engine light on (bi-fuel versions)
- Cylinder 7 misfire or rich running on gas
- Gas mode blocked or ended
Common causes of P22F2
- Most likelyCylinder 7 injector control wire grounded on the engine or bracket
- PossibleOpen wire or poor pin contact (reported as Low)
- PossibleCylinder 7 gas injector coil failed
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 P22F2 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). |
| F2 | The exact fault in that area. |
What to do next
- Note P22F2 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 P22F2
What does P22F2 mean?
P22F2 means "Cylinder 7 Alternative Fuel Injector Control Circuit Low". Low voltage on the control line of the cylinder 7 gas injector. It is a generic code, so it means the same on every make.
Is it safe to drive with P22F2?
Drive gently and only to a workshop. With P22F2 the car can go into limp mode (reduced power) to protect itself.
Will P22F2 fail an emissions test?
Yes, it can. P22F2 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 P22F2 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P22F2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.