The seat module has detected a fault in the fore/aft adjustment switch on the driver seat. Manual adjustment of the seat position may be limited or not work at all.
Low severity. Can I keep driving?You can normally keep driving. If it affects the lights or visibility, get it repaired before driving at night or in the rain.
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Most likely causes
- Seat adjustment switch failed
- Wiring or connector fault
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
What each character of B0312 means
- B: Body
- 0: Generic code: same on every make
- 3: Subsystem depends on the code range
- 12: Specific fault in that system
Frequently asked questions
Can I keep driving with code B0312?
You can normally keep driving. If it affects the lights or visibility, get it repaired before driving at night or in the rain.
What causes code B0312?
The most common causes are: seat adjustment switch failed; wiring or connector fault.
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.