P2B1ECylinder 8 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
- P2B1E means injector 8 has not received a learned pulse offset. As the final cylinder in the group it belongs to V8 engines; Ford's 6.7 L V8 would be the obvious candidate, but Ford publishes only the exceeded-limit code P2B1F for it, so no manufacturer source for P2B1E exists. CARB leaves the time allowed for learning to the manufacturer: per (f)(4.2.4)(A)(i) a fault exists when feedback control has not begun within that interval. Because an eight-cylinder needs one learned set per injector and pressure level, GM patented an extrapolation of values to shorten the learning time. In service the code mostly points to a learn that was reset or never had suitable coasting phases; only if it comes back under good conditions do injector 8, its wiring or the crank signal come into question.
- What you may notice
- Warning lamp
- Mostly no noticeable change in running
- Likely causes
- LikelyLearn values reset or injector 8 replaced, learn not finished
- PossibleFew coasting phases with fuel cut-off in everyday use
- RareFault in the crank speed signal or the injector 8 wiring
- 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.