The airbag control module sees a short to power in the front crash sensor circuit
What it means
B104D. The airbag control module sees a short to power in the front crash sensor circuit. The airbag light stays on and the system may not protect in a crash.
Findings, check these first
- Faulty front crash sensor
- Crash sensor harness shorted to power
- Poor connector at the crash sensor
- Damaged airbag system wiring
- Faulty airbag control module
Standard procedure
- Disconnect the battery and wait before touching airbag circuits
- Confirm the code and inspect the front crash sensor
- Check the sensor harness for a short to power
- Inspect the sensor and airbag module connectors
- Replace the failed sensor or module only 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.
- B104D 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.
- B104D FORD Crash Zone Sensor And Other Sensor Circuits Short To Power Supply | 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 B104D. Include your vehicle, the issue and a source if you have one.