The body control module sees a fault in the ignition control circuit
What it means
B10FF. The body control module sees a fault in the ignition control circuit. The vehicle may not switch between accessory, run and start modes correctly.
Findings, check these first
- Faulty ignition switch
- Open or shorted ignition wiring
- Poor ignition switch connector
- Faulty body control module
- Blown fuse in the ignition feed
Standard procedure
- Confirm the code and test the ignition switch
- Inspect the switch, fuse and connectors
- Check the ignition control circuit
- Verify module power and ground
- 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.
- B10FF FORD Ignition 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.
- B10ff Ford - Ignition 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 B10FF. Include your vehicle, the issue and a source if you have one.