P2C8A
Hybrid/EV Battery Interface Control Module A Performance
The hybrid battery interface control module A reports a performance fault. Internal self-tests fail or response time outside calibration.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Common causes
Ordered by how often each turns out to be the cause.
- Internal control module faultCommon
- Communication with BMS degradedPossible
- Pack cell imbalance approaching service thresholdLess likely
Parts involved
- Hybrid Battery Interface Cm A
- Bms
P2C8A is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.