Powertrain
generic / SAE
P0A0C
High Voltage System Interlock Circuit Low
The HV interlock signal is below threshold, indicating broken loop or short to ground. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / 0C
Possible causes
- Interlock loop broken high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: shop only
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–5 h
- Component: hv interlock loop
- Component: hv service connector
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012