P021ECylinder 11 Injection Timing
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P021E reports a fault in the injection timing of cylinder 11 on a diesel engine. Unlike P01DF/P01E0 ('over retarded/advanced', the result of the injector learning routine in overrun), this code has no direction, and what it checks is up to the manufacturer. A cylinder 11 code only applies to engines with 11 or more cylinders. No manufacturer or vehicle using it was found – GM's documents stop at cylinder 8 (P021B), FCA's at cylinder 6, and Ford uses other codes. The description therefore follows the documented siblings: GM checks the injector's current rise electrically, FCA ties the code to injector learning. CARB requires diesel engines to detect injection that is too early or too late.
- What you may notice
- Check engine light on
- Rough running or misfire, rough idle
- Loss of power, smoke or knocking possible
- Likely causes
- LikelyInjector of cylinder 11 faulty (coil, armature, wear, deposits)
- PossibleInjector wiring or connector: contact resistance, corrosion, chafing
- RareEngine software sets the code falsely (update available for some models)
- RareInjector driver stage or boost voltage in the engine module
- RareWrong injector code, contaminated fuel or loose injector clamp
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.