OBD-II code · Powertrain (generic)
P0A8C 14 Volt Power Module System Voltage Unstable
The 14V DC/DC converter module reports a "system voltage unstable" condition. 12V vehicle electrical supply may be impaired.
Is it safe to drive with P0A8C?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyVoltage regulation unstable
- PossibleLoad oscillation
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Pm14v Module, Dcdc Converter
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.