P02C5Cylinder 11 - Injector Leaking
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- These codes belong to an individual-cylinder fuel correction: a diesel's cylinder balance control measures each cylinder's crankshaft acceleration and adjusts its injection quantity; on petrol engines a cylinder-selective mixture control does the same. CARB requires the system to report when such a correction has used up its range or one cylinder causes an imbalance. P02C5 means the module detects fuel entering cylinder 11 outside the injection pulse – the injector is leaking or dripping. A BMW patent identifies such a leak by the fact that it persists with the injector switched off. A leaking diesel injector can dilute the oil or damage the piston, so act promptly. Cylinder 11 only exists on engines with twelve or more cylinders. GM and Ford use other codes for this (P0263 ff, P219A ff); no manufacturer document describing this code with thresholds was found, so the description follows CARB and published patents.
- What you may notice
- Check engine light on
- Rough idle, vibration
- Smoke, fuel smell, knocking
- Likely causes
- LikelyNozzle seat or needle of the cylinder 11 injector leaking
- PossibleDeposits keeping the needle from closing fully
- RareRail pressure too high
- RareWrong or wrongly coded injector
- 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: €150 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.