P22DE code meaning
Cylinder 2 Alternative Fuel Injector Control Circuit Low
Powertrain system Generic code P22xx codes Check engine light
What P22DE means
P22DE stands for a control line of the cylinder 2 gas injector whose voltage is too low. TransEco Energy's AFCM fault table blames a grounded or interrupted wire and turns on the MIL for bi-fuel vehicles; Ford's 2014 OBD code list includes P22DE as a MIL code too. California's OBD rule counts a bi-fuel car among alternate-fueled vehicles just for the periods it actually burns gas, so this monitor matters mainly in gas mode, and on gasoline the car normally behaves as usual. If the grounded wire keeps the injector energized, cylinder 2 is flooded with gas and the plug may foul; a separated wire starves it instead. P22DF is the high side, P22DD the open-circuit code, and P0264 belongs to the gasoline injector.
P22DE 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 P22DE
- Malfunction indicator lamp on
- Rich misfire or fouled spark plug on cylinder 2 in gas mode
- Gas operation interrupted, engine runs on gasoline
Common causes of P22DE
- Most likelyCylinder 2 injector control wire grounded on engine or body
- PossibleOpen wire or pin, reported as Low by modules like the TransEco AFCM
- Less likelyShorted output transistor in the 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 P22DE 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). |
| DE | The exact fault in that area. |
What to do next
- Note P22DE 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 P22DE
What does P22DE mean?
P22DE means "Cylinder 2 Alternative Fuel Injector Control Circuit Low". P22DE stands for a control line of the cylinder 2 gas injector whose voltage is too low. It is a generic code, so it means the same on every make.
Is it safe to drive with P22DE?
Drive gently and only to a workshop. With P22DE the car can go into limp mode (reduced power) to protect itself.
Will P22DE fail an emissions test?
Yes, it can. P22DE 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 P22DE to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P22DE clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.