P0C14
Drive Motor B Inverter Phase U Over Temperature
The inverter phase U of drive motor B reports junction temperature above the protection threshold. Sustained high phase current.
- 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.
- Sustained phase overloadCommon
- Local cooling failurePossible
Parts involved
- Drive Motor B Inverter Phase U
P0C14 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.