P2B10Cylinder 1 Injection Pulse Offset Not Learned
- 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
- P2B10 means the engine control holds no valid learned offset for injector 1 – the correction of the opening time used for very small injection quantities has not been established. No manufacturer documents this code publicly. Ford, the one maker with a published monitor for this group, lists only the exceeded-limit codes (P2B11 and siblings) for its Power Stroke diesels. The legal basis is CARB 13 CCR 1968.2 (f)(4.2.4)(A)(i): a fuel system feedback that does not begin working within a time chosen by the manufacturer counts as a malfunction. A Bosch patent explains the learn itself: in overrun the activation time of a test injection is raised in small steps from a value too short to open the injector until the crankshaft speed reacts. P2B11 is the partner for a value that was learned but lies out of range.
- What you may notice
- Warning lamp, otherwise often no noticeable effect
- Possibly harder combustion noise at idle on cylinder 1
- Likely causes
- LikelyLearn values cleared – after replacing injector 1 or the control unit, or after an adaption reset with a scan tool
- PossibleToo few coasting phases with fuel cut-off for the learn to run
- RareInjector 1 opening inconsistently, so no stable value is found
- 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: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.