OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0A0A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyService connector loose or damaged
- PossibleHV cable damaged
Repair at a glance
- Difficulty
- Shop_only
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Interlock Loop, Hv Service Connector, Hv Battery
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.