Code Definition

B2385 — Audio Navigation Mute Input Ckt Failure

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2385

B2385 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B2385 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

On vehicles with factory navigation systems, the navigation module provides a mute request signal to the audio system so that audio playback is automatically lowered while spoken turn by turn directions are being announced. The audio module monitors this mute input and reduces volume on the entertainment audio source when the request is active. DTC B2385 sets when the audio module detects a general failure on the navigation mute input circuit, meaning the input is not behaving correctly during voice prompts or is reading invalid voltage levels that do not match either the active or inactive st...

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