Code Definition

B2406 — Audio Single-Disc CD Player Internal Fault

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

About B2406

B2406 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 B2406 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

The Body Control Module (BCM) or Audio Control Module monitors the operation of the factory integrated single disc CD player via internal status reporting from the playback subsystem. DTC B2406 is set when the module detects a generic internal fault in the single disc CD assembly that is not specifically a thermal shutdown, mechanism jam, or focus error condition. The underlying cause may be a failed servo processor, corrupted firmware, a damaged ribbon cable between the main board and the disc mechanism, or an internal power supply rail fault. When the code is set, single disc CD playback is ...

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