OBD
P0A0C
High Voltage System Interlock Circuit A Low
What it means
P0A0C means High Voltage System Interlock Circuit A Low.
Check these first
- Short to ground in the high voltage interlock A circuit
- An open in the high voltage interlock wiring
- Damaged high voltage connector or terminal
- A fault in the high voltage system control module
- Low 12 volt battery voltage
What to do next
- Check the 12 volt battery voltage
- Inspect the high voltage interlock A wiring
- Test the interlock A circuit for a short to ground
- Check high voltage connector terminals
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.