The accessory protocol interface module sees a general electrical failure in the handset microphone circuit
What it means
B116A. The accessory protocol interface module sees a general electrical failure in the handset microphone circuit. The microphone may not pick up sound for hands-free calls or voice commands..
Findings, check these first
- Faulty handset microphone
- Handset microphone harness open or shorted
- Poor electrical connection in the microphone circuit
- Faulty accessory protocol interface module
Standard procedure
- Confirm the code and test the microphone circuit
- Inspect the handset microphone and its connector
- Check the microphone harness for an open or short
- Verify the module power, ground and connections
- Replace the failed microphone or module after tests
Code lookup
Type a code above, or start from a symptom or a common code.
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Sources and review
Review: qualified. Read the source limits below.
- B116A 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 B116A
Fetched directly. B116A reads "Handset Microphone General Electrical Failure". obdii.pro carries no definition for this code, so there is no Ford-family corroboration.
Last updated 2026-10-02.
Report a correction for B116A. Include your vehicle, the issue and a source if you have one.