The body control module sees a fault in the rear window defrost LED circuit
What it means
B112D. The body control module sees a fault in the rear window defrost LED circuit. The defrost indicator may not light even when the grid is working.
Findings, check these first
- Faulty rear window defrost LED
- Open or shorted LED wiring
- Poor LED connector
- Faulty body control module
- Damaged defrost switch assembly
Standard procedure
- Confirm the code and test the defrost indicator
- Inspect the LED and its connector
- Check the LED circuit for an open or short
- Verify the defrost switch operation
- Replace the failed LED 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.
- B112D FORD Rear Window Defrost LED 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.
- B112d Ford - Rear Window Defrost LED 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.
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