The body control module sees an invalid ignition status signal
What it means
B1142. The body control module sees an invalid ignition status signal. The vehicle may not switch between the run and start modes correctly.
Findings, check these first
- Faulty ignition switch
- Open or shorted ignition wiring
- Poor ignition switch connector
- Faulty body control module
- Low battery or charging system fault
Standard procedure
- Confirm the code and test the ignition switch inputs
- Inspect the ignition switch and its connector
- Check the ignition status circuits for an open or short
- Verify battery voltage and grounds
- Replace the failed switch 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.
- B1142 FORD Ignition Status 1 Signal Invalid: 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.
- B1142 Ford - Ignition Status 1 Signal Invalid | 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.
Report a correction for B1142. Include your vehicle, the issue and a source if you have one.