The body control module sees the cabin lock and unlock switch signal stuck low
What it means
B108F. The body control module sees the cabin lock and unlock switch signal stuck low. The door locks may not respond to the switch.
Findings, check these first
- Faulty cabin lock and unlock switch
- Short to ground in the switch circuit
- Chafed switch wiring
- Poor connector at the switch or module
- Faulty body control module
Standard procedure
- Confirm the code and test the lock and unlock switch
- Inspect the switch and its connector
- Check the switch circuit for a short to ground
- Verify the lock and unlock relays
- Replace the failed switch or module after tests
Code lookup
Type a code above, or start from a symptom or a common code.
Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.
Sources and review
Review: checked against the recorded source material.
- B108F FORD: Code Meaning, Causes, Symptoms, & Tech Notes | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: code identity, Ford meaning and possible causes
Fetched directly. Ford title, meaning and causes match the catalog record. Model and year fitment remain curator claims.
- B108F FORD Cabin Lock/Unlock Switch Signal Stuck Low | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Ford meaning and causes
Same Ford text as the engine-codes page (both sites share one publisher).
Last updated 2026-09-26.
Report a correction for B108F. Include your vehicle, the issue and a source if you have one.