P22ED code meaning
Cylinder 6 Alternative Fuel Injector Control Circuit/Open
Powertrain system Generic code P22xx codes Check engine light
What P22ED means
P22ED marks an open control circuit at the cylinder 6 gas injector, the last injector on six-cylinder engines like the 3.6-litre V6 of GM's 2015 bi-fuel Impala, where the ECM drives the CNG injectors directly. Current is missing when the injector should open, so the module records the break. No maker documents P22ED openly: the TransEco AFCM table and Ford's 2014 code list give cylinder 6 only P22EE and P22EF, and TransEco reports an interrupted line as Low, so the same fault may appear as P22EE on such systems. The Impala's ECM changes to the other fuel when one system cannot deliver, so the driver mostly sees gasoline operation and the MIL. Check coil resistance and connector first. P0206 is the gasoline counterpart.
P22ED 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 P22ED
- Malfunction indicator lamp on
- Vehicle runs on gasoline although gas is selected
- Cylinder 6 misfire on dedicated gas engines
Common causes of P22ED
- Most likelyOpen coil in the cylinder 6 gas injector
- PossibleLoose or corroded connector at cylinder 6
- Less likelyBroken wire between control module and cylinder 6 injector
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 P22ED 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). |
| ED | The exact fault in that area. |
What to do next
- Note P22ED 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 P22ED
What does P22ED mean?
P22ED means "Cylinder 6 Alternative Fuel Injector Control Circuit/Open". P22ED marks an open control circuit at the cylinder 6 gas injector, the last injector on six-cylinder engines like the 3.6-litre V6 of GM's 2015 bi-fuel Impala, where the ECM drives the CNG injectors directly. It is a generic code, so it means the same on every make.
Is it safe to drive with P22ED?
Drive gently and only to a workshop. With P22ED the car can go into limp mode (reduced power) to protect itself.
Will P22ED fail an emissions test?
Yes, it can. P22ED 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 P22ED to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P22ED clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.