P015FExcessive Time to Enter Closed Loop Cylinder Balance Control
- 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
- Cylinder balance control evens out the contribution of individual cylinders – on diesels by adjusting each injector's quantity based on crankshaft speed fluctuations. P015F, by its title, is set when this closed-loop control does not become active within the expected time after starting, for example because the crankshaft wheel has not been learned or the conditions are missing. No manufacturer using P015F was found: Ford's 2023 diesels run cylinder balancing (maximum correction 3.5–15 mg per stroke) but report problems as P0263–P0284. The description therefore rests on CARB's requirement for feedback controls and that comparable function; causes are derived, not documented.
- What you may notice
- Check engine light on
- Possibly rough idle
- Often no symptoms
- Likely causes
- PossibleCrankshaft wheel adaptation not learned or speed signal disturbed
- PossibleInjector deviating strongly or injector circuit fault
- RareControl module software
- 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: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.