The audio module sees the subwoofer enable circuit shorted to battery
What it means
B1155. The audio module sees the subwoofer enable circuit shorted to battery. The subwoofer may go silent or distort badly.
Findings, check these first
- Short to voltage in the subwoofer circuit
- Faulty subwoofer amplifier
- Chafed subwoofer wiring
- Poor amplifier connector
- Faulty audio control module
Standard procedure
- Confirm the code and test the subwoofer enable circuit
- Inspect the subwoofer amplifier and its connector
- Check the circuit for a short to voltage
- Verify amplifier power and ground
- Replace the failed amplifier 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.
- B1155 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.
- B1155 Ford - Subwoofer 1 Short to Battery | 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).
Source caveat: The engine-codes page title is blank but its description and causes name the subwoofer enable circuit; the autocodes title names Subwoofer 1 Short to Battery. Both pages agree on the circuit.
Last updated 2026-09-29.
Report a correction for B1155. Include your vehicle, the issue and a source if you have one.