P2E5C code meaning
Cylinder 4 Alternative Fuel Misfire Detected
Powertrain system Generic code P2Exx codes Check engine light
What P2E5C means
P2E5C is stored when the misfire counter blames cylinder 4 while gas is being burned; in gasoline mode the code would be P0304. No manufacturer documents P2E5C publicly, and Deutz's fault list for its eControls LPG, CNG and bi-fuel engines reports such events with the ordinary P0301 to P0304. On four-cylinder engines cylinder 4 is the last one in the block. Ignition is the main gas-related suspect: NGK points out that a gas/air charge needs a clearly higher firing voltage than gasoline, which loads the coils and wears the plugs faster, and the US Department of Energy notes that natural gas reacts more sensitively to spark quality. A coil or plug that still works on gasoline can therefore drop out on gas alone. Check plug type and gap for gas, coil and trunk, then move the coil to another cylinder.
P2E5C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P2E5C
- Misfire mainly under load or acceleration on gas
- Engine runs cleanly after switching to gasoline
- Check engine light, flashing during heavy misfire
Common causes of P2E5C
- Most likelySpark plug on cylinder 4 worn or unsuited for gas (gap too wide, wrong heat range)
- Most likelyCoil or plug trunk on cylinder 4 breaking down under the higher firing voltage
- PossibleGas injector on cylinder 4 sticking or delivering too little
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 4Ignition coil cyl 4
What each part of P2E5C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5C | The exact fault in that area. |
What to do next
- Note P2E5C 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 P2E5C
What does P2E5C mean?
P2E5C means "Cylinder 4 Alternative Fuel Misfire Detected". P2E5C is stored when the misfire counter blames cylinder 4 while gas is being burned; in gasoline mode the code would be P0304. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E5C?
Drive gently and only to a workshop. With P2E5C the car can go into limp mode (reduced power) to protect itself.
Will P2E5C fail an emissions test?
Yes, it can. P2E5C 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 P2E5C to fix?
Difficulty: easy. A typical repair takes 0.3 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2E5C 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.