P22E9 code meaning
Cylinder 5 Alternative Fuel Injector Control Circuit/Open
Powertrain system Generic code P22xx codes Check engine light
What P22E9 means
P22E9 is the open-circuit code for the cylinder 5 gas injector and can only appear on engines with five or more cylinders, such as the V6 of GM's bi-fuel Impala or the 6.0-litre V8 of its bi-fuel Silverado and Sierra. The driver detects the break because current is missing when the injector is commanded on. No maker documents P22E9 publicly; TransEco's AFCM list and Ford's 2014 code list only use P22EA and P22EB for cylinder 5, and TransEco treats an open line as Low. On V engines the injector wiring of each bank often runs in its own harness branch, so check the cylinder 5 branch from the module to the injector. Bi-fuel vehicles fall back to gasoline; P0205 is the gasoline counterpart.
P22E9 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 P22E9
- Malfunction indicator lamp on
- Engine returns to gasoline after switching to gas
- Cylinder 5 misfire if gas operation continues
Common causes of P22E9
- Most likelyOpen coil in the cylinder 5 gas injector
- PossibleLoose connector in the harness branch for this bank
- Less likelyOpen driver output in the gas or injector 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 P22E9 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). |
| E9 | The exact fault in that area. |
What to do next
- Note P22E9 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 P22E9
What does P22E9 mean?
P22E9 means "Cylinder 5 Alternative Fuel Injector Control Circuit/Open". P22E9 is the open-circuit code for the cylinder 5 gas injector and can only appear on engines with five or more cylinders, such as the V6 of GM's bi-fuel Impala or the 6.0-litre V8 of its bi-fuel Silverado and Sierra. It is a generic code, so it means the same on every make.
Is it safe to drive with P22E9?
Drive gently and only to a workshop. With P22E9 the car can go into limp mode (reduced power) to protect itself.
Will P22E9 fail an emissions test?
Yes, it can. P22E9 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 P22E9 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P22E9 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.