OBD-II code · Powertrain (generic, extended)
P2B1F Cylinder 8 Injection Pulse Offset Exceeded Learning Limit
The injection pulse offset adaptation for cylinder 8 exceeds the calibrated learning window. Injector aging or fuel pressure drift beyond compensation.
Is it safe to drive with P2B1F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyInjector worn beyond compensation range
- PossibleFuel rail pressure drift
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.3–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Injector Cyl 8, Ecm
Related codes
- P2B11Cylinder 1 Injection Pulse Offset Exceeded Learning Limit
- P2B13Cylinder 2 Injection Pulse Offset Exceeded Learning Limit
- P2B15Cylinder 3 Injection Pulse Offset Exceeded Learning Limit
- P2B17Cylinder 4 Injection Pulse Offset Exceeded Learning Limit
- P2B19Cylinder 5 Injection Pulse Offset Exceeded Learning Limit
- P2B1BCylinder 6 Injection Pulse Offset Exceeded Learning Limit
- P2B1DCylinder 7 Injection Pulse Offset Exceeded Learning Limit
- P2B1CCylinder 7 Injection Pulse Offset Not Learned
- P2B1ECylinder 8 Injection Pulse Offset Not Learned
- P2B20Hybrid/EV Electronics Coolant Temperature Sensor B Circuit
- P2B21Hybrid/EV Electronics Coolant Temperature Sensor B Range/Performance
- P2B22Hybrid/EV Electronics Coolant Temperature Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.