OBD-II code · Powertrain (generic)
P0A0D High Voltage System Interlock Circuit High
The HV interlock signal voltage is above threshold, indicating short to battery or unexpected continuity loss.
Is it safe to drive with P0A0D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to battery on interlock
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Shop_only
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Interlock Loop, Hv Service Connector
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.