P0C7A
Drive Motor B Inverter Voltage Too High
The drive motor B inverter DC-link voltage exceeds the protection threshold. Regenerative braking overshoot or BMS regulation fault.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
Common causes
Ordered by how often each turns out to be the cause.
- Regenerative braking overshootCommon
- BMS regulation outside calibrationPossible
Parts involved
- Drive Motor B Inverter
- Dc Link Capacitor
P0C7A 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.