OBD-II code · Powertrain (generic)
P0A12 DC/DC Converter Communication
The hybrid control module loses CAN bus communication with the DC/DC converter for longer than the fault threshold.
Is it safe to drive with P0A12?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyCAN bus fault
- PossibleConverter unpowered or offline
- Less likelyGateway module routing CAN messages incorrectly
Repair at a glance
- Difficulty
- Shop_only
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Dc Dc Converter, Can Bus, Hybrid Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.