The body control module sees a problem with the brake fluid level switch circuit
What it means
B1048. The body control module sees a problem with the brake fluid level switch circuit. The brake warning light can come on or the low fluid message may be false.
Findings, check these first
- Low brake fluid level
- Faulty brake fluid level switch
- Open signal or return circuit
- Poor connector at the fluid reservoir
- Faulty body control module
Standard procedure
- Confirm the code and check the brake fluid level
- Inspect the reservoir switch and connector
- Test the switch signal and return circuits
- Check the switch for a short or open
- Repair the circuit or replace the failed switch 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.
- B1048 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.
- B1048 FORD Brake Fluid Level Switch Low Fluid Level | 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 B1048. Include your vehicle, the issue and a source if you have one.