The front controls module sees a short in the cabin temperature sensor fan circuit
What it means
B105A. The front controls module sees a short in the cabin temperature sensor fan circuit. The climate system loses accurate cabin temperature readings.
Findings, check these first
- Faulty cabin temperature sensor fan
- Short to battery in the fan circuit
- Short to ground or open in the fan circuit
- Poor connector at the temperature sensor
- Faulty front controls interface module
Standard procedure
- Confirm the code and check the climate control operation
- Inspect the in-vehicle temperature sensor and connector
- Test the sensor fan circuit for a short or open
- Check the sensor for contamination or blockage
- Replace the failed sensor 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.
- B105A 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.
- B105A FORD Cabin Temperature Sensor Fan Circuit Short | 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 B105A. Include your vehicle, the issue and a source if you have one.