The body control module sees a fault in the high mounted stop lamp circuit
What it means
B1115. The body control module sees a fault in the high mounted stop lamp circuit. The center brake lamp may not light or may stay on.
Findings, check these first
- Faulty high mounted stop lamp
- Open or shorted lamp wiring
- Poor lamp connector
- Faulty stop lamp switch
- Faulty body control module
Standard procedure
- Confirm the code and test the high mounted stop lamp
- Inspect the lamp and its connector
- Check the lamp circuit for an open or short
- Test the stop lamp switch
- Replace the failed lamp 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.
- B1115 FORD High Mounted Stop Lamp Control Circuit: 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.
- B1115 Ford - High Mounted Stop Lamp Control Circuit | AutoCodes.com
archived reference page (autocodes.com via Wayback Machine)
Supports: corroboration of Ford meaning and causes
Fetched directly. Same Ford text as the engine-codes page (both sites share one publisher).
Last updated 2026-09-29.
Report a correction for B1115. Include your vehicle, the issue and a source if you have one.