P22EE code meaning
Cylinder 6 Alternative Fuel Injector Control Circuit Low
Powertrain system Generic code P22xx codes Check engine light
What P22EE means
On engines that burn natural gas or propane through their own gas injectors, the control module watches the drive line of each gas valve. This code means the line to the cylinder 6 gas injector sits at a lower voltage than the switching state allows. The installer table of the Altech-Eco (formerly TransEco) CNG system for Ford F-150, Super Duty and Transit treats both a short to ground and a broken wire as this fault; it lights the MIL on bi-fuel trucks but not on dedicated CNG ones. Ford lists the code with MIL in its 2014 spark-ignition code list and checks it continuously. With a grounded line the valve may stay energised; an open line leaves it shut. Bi-fuel engines usually keep running on gasoline.
P22EE 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 P22EE
- Check engine light on (bi-fuel versions)
- Rough running or misfire on cylinder 6 in gas mode
- System switches to gasoline or will not enter gas mode
Common causes of P22EE
- Most likelyControl wire of the cylinder 6 gas injector chafed through to ground
- PossibleBroken wire or loose plug at the gas injector (counted as Low by this system)
- PossibleGas injector coil burnt open
- Less likelyFaulty output stage in the PCM or gas control module
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 P22EE 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). |
| EE | The exact fault in that area. |
What to do next
- Note P22EE 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 P22EE
What does P22EE mean?
P22EE means "Cylinder 6 Alternative Fuel Injector Control Circuit Low". On engines that burn natural gas or propane through their own gas injectors, the control module watches the drive line of each gas valve. It is a generic code, so it means the same on every make.
Is it safe to drive with P22EE?
Drive gently and only to a workshop. With P22EE the car can go into limp mode (reduced power) to protect itself.
Will P22EE fail an emissions test?
Yes, it can. P22EE 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 P22EE to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P22EE clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.