P2E59Cylinder 1 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
- P2E59 means that, while the engine is burning its gaseous fuel, the misfire monitor puts the dropouts on cylinder 1; CARB allows a single-cylinder code once more than 90 % of counted misfires fall on one cylinder. In most numbering schemes cylinder 1 is the frontmost. No manufacturer publishes P2E59. Honda logged misfire on its 2008 Civic CNG as P0301 to P0304 and had dealers swap coils to see whether the fault moved with the coil. On GM's 2013 Silverado/Sierra bi-fuel the injector module hands over from petrol to CNG injectors one cylinder after another, starting at cylinder 1, so a misfire seen only at changeover should be told apart from one in steady gas mode. Check the CNG injector, its hose and nozzle on cylinder 1, then coil and plug. Misfire on petrol too: P0301.
- What you may notice
- Rough idle on gas that disappears in petrol mode
- Stumble at the moment the system changes over to gas
- Check engine light, possibly flashing under load
- Likely causes
- LikelySticking or leaking gas injector on cylinder 1
- PossibleCracked injector hose or loose nozzle in the intake port of cylinder 1
- PossibleWeak coil or worn plug on cylinder 1 that fails only under gas
- RareFault in the fuel changeover module or its programming (misfire only at the switch from petrol to 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 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.