The driver door module lost LIN communication on a second bus with a door module
What it means
B1088. The driver door module lost LIN communication on a second bus with a door module. Power windows, locks and switch lights on that door stop working.
Findings, check these first
- Open in the second LIN bus between the driver door module and the door module
- Short to voltage or ground on the second LIN bus
- Window control switch on the door failing
- Door module on the second bus failing
- Corroded connector at the second bus door module
Standard procedure
- Confirm the code and check the window and lock function on that door
- Inspect the second bus door module connector and LIN wiring
- Test the second LIN bus for an open, short to ground or short to power
- Test the window switch in both directions
- Replace the door module only after the switch and second bus wiring test clean
- Clear the code and retest to confirm the second bus communication returns
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.
- B1088 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.
- B1088 FORD Door Module LIN Bus 'B' | 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 2026-10-10.
Report a correction for B1088. Include your vehicle, the issue and a source if you have one.