OBD-II code · Powertrain (generic, extended)
P2C8B Hybrid/EV Battery Interface Control Module B Performance
The hybrid battery interface control module B reports a performance fault. Internal self-tests fail or response time outside calibration.
Is it safe to drive with P2C8B?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyInternal control module fault
- PossibleCommunication with BMS degraded
- Less likelyPack cell imbalance approaching service threshold
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Hybrid Battery Interface Cm B, Bms
Related codes
- P2C8AHybrid/EV Battery Interface Control Module A Performance
- P2C88Hybrid/EV Battery Voltage System Isolation Warning
- P2C89Hybrid/EV Battery System Precharge Current Too High
- P2C8CDC/DC Converter Temperature Sensor D Circuit
- P2C8DDC/DC Converter Temperature Sensor D Circuit Range/Performance
- P2C8EDC/DC Converter Temperature Sensor D Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.