P2E5FCylinder 7 Alternative Fuel Misfire Detected
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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 petrol 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 petrol 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.
- What you may notice
- Rough running on gas, smooth on petrol
- Gas-mode indicator flashing or automatic return to petrol
- Check engine light
- Likely causes
- 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
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.