The audio control module sees an out-of-range reference voltage from the steering wheel audio switches
What it means
B11BA. The audio control module sees an out-of-range reference voltage from the steering wheel audio switches. The steering wheel audio buttons may stop working..
Findings, check these first
- Faulty steering wheel audio switch pack
- Steering wheel audio switch harness open or shorted
- Poor electrical connection in the switch circuit
- Faulty audio control module or accessory protocol interface module
Standard procedure
- Confirm the code and test the switch reference voltage
- Inspect the steering wheel switch pack and its connector
- Check the switch circuits for an open or short
- Verify the module power and ground
- Replace the failed switch pack or module after tests
Code lookup
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Sources and review
Review: qualified. Read the source limits below.
- B11BA FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes - OBD2 Codes
live reference page (obd2-codes.co)
Supports: FORD and Ford-family meaning and likely causes for B11BA
Fetched directly. B11BA reads "Steering Wheel Audio Switch Pack". obdii.pro carries no definition for this code, so there is no Ford-family corroboration.
Last updated 2026-10-02.
Report a correction for B11BA. Include your vehicle, the issue and a source if you have one.