P2E5A code meaning
Cylinder 2 Alternative Fuel Misfire Detected
Powertrain system Generic code P2Exx codes Check engine light
What P2E5A means
P2E5A says cylinder 2 is the one losing combustion while the engine is supplied with alternative fuel; P0302 is its gasoline twin. No manufacturer documents this code publicly. On inline engines cylinder 2 follows cylinder 1; on V engines it is either the foremost cylinder on the other bank (GM, Chrysler) or the second one of the first bank (Ford, Audi). The gas injector is the typical gas-specific suspect: compressor oil carried in CNG condenses after the pressure regulator, reaches the injectors unevenly and can gum single valves or make them close erratically, as GM and Siemens patents describe. Landi Renzo's service manual for its 6.0-litre CNG conversion asks for misfire codes to check the injector plug, the nozzle seated in its port, the drive signal and injector wiring not crossed between cylinders.
P2E5A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P2E5A
- Uneven running on gas, normal on gasoline
- Higher gas consumption and loss of power
- Check engine light
Common causes of P2E5A
- Most likelyGas injector on cylinder 2 gummed or sluggish from compressor oil in the gas
- PossibleInjector harness of the conversion routed crosswise, so cylinder 2 receives another cylinder's pulse
- PossibleInjection nozzle of cylinder 2 not properly seated in the manifold port
- PossibleCoil or plug on cylinder 2 too weak for gas operation
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alt fuel injector cyl 2Ignition coil cyl 2
What each part of P2E5A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5A | The exact fault in that area. |
What to do next
- Note P2E5A 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 P2E5A
What does P2E5A mean?
P2E5A means "Cylinder 2 Alternative Fuel Misfire Detected". P2E5A says cylinder 2 is the one losing combustion while the engine is supplied with alternative fuel; P0302 is its gasoline twin. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E5A?
Drive gently and only to a workshop. With P2E5A the car can go into limp mode (reduced power) to protect itself.
Will P2E5A fail an emissions test?
Yes, it can. P2E5A 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 P2E5A to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2E5A clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.