OBD-II code · Body
B0339 Rear Seat Heater Circuit
The body control module has detected a fault in the rear seat heater circuit. The rear heating elements are open or shorted.
Is it safe to drive with B0339?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHeater element broken
- PossibleWiring open under seat
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Seat Heater Element, Rear Seat Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.