P2E5F code meaning
Cylinder 7 Alternative Fuel Misfire Detected
Powertrain system Generic code P2Exx codes Check engine light
What P2E5F means
P2E5F puts alternative-fuel misfire on cylinder 7, so it concerns eight-cylinder engines, for instance GM's Vortec 6.0 V8 in the bi-fuel Silverado/Sierra or the dedicated CNG and LPG Express/Savana vans that GM lists in its gaseous-fuel overview bulletin. P0307 is the gasoline counterpart. No maker documents P2E5F publicly. On GM V8s cylinder 7 is the rear cylinder of the odd-numbered bank; on Ford V8s it is the third cylinder of the second bank. Conversion hardware adds failure points per cylinder: Ford's 2003 bi-fuel CNG system fed gas through sleeves set into each gasoline injector seat, with a separate module driving the gas injectors, and Landi Renzo's 6.0-litre manual tells technicians to verify each nozzle in its port and the routing of the injector harness. Check these before the coil.
P2E5F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2E5F
- Rough running on gas, smooth on gasoline
- Gas-mode indicator flashing or automatic return to gasoline
- Check engine light
Common causes of P2E5F
- Most likelyGas injector on cylinder 7 faulty or sticking
- PossibleLeaking injector sleeve or loose nozzle at cylinder 7's intake runner
- PossibleConversion injector harness damaged or misrouted near the rear of the engine
- PossibleCoil or plug on cylinder 7 too weak for gas
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 7Ignition coil cyl 7
What each part of P2E5F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5F | The exact fault in that area. |
What to do next
- Note P2E5F 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 P2E5F
What does P2E5F mean?
P2E5F means "Cylinder 7 Alternative Fuel Misfire Detected". P2E5F puts alternative-fuel misfire on cylinder 7, so it concerns eight-cylinder engines, for instance GM's Vortec 6.0 V8 in the bi-fuel Silverado/Sierra or the dedicated CNG and LPG Express/Savana vans that GM lists in its gaseous-fuel overview bulletin. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E5F?
Drive gently and only to a workshop. With P2E5F the car can go into limp mode (reduced power) to protect itself.
Will P2E5F fail an emissions test?
Yes, it can. P2E5F 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 P2E5F to fix?
Difficulty: medium. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P2E5F 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.