P0A0A
High Voltage System Interlock Circuit
The hybrid system detects loss of high-voltage interlock continuity. The interlock loop is a safety feature that disables HV power if any service connector is opened.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: shop_only
Common causes
Ordered by how often each turns out to be the cause.
- Service connector loose or damagedCommon
- HV cable damagedPossible
Parts involved
- Hv Interlock Loop
- Hv Service Connector
- Hv Battery
P0A0A 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.