Code Definition

B2402 — Audio CD/DJ Thermal Shutdown Fault

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

About B2402

B2402 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 B2402 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 integrated Audio Control Module monitors the internal temperature of the factory CD player or in dash CD changer (often referred to as CD/DJ) via a thermal sensor. DTC B2402 is set when the module detects that the internal operating temperature has exceeded the safe threshold and the unit has been forced into thermal shutdown to protect the optical pickup, laser diode, and disc transport components. This condition can be caused by ambient heat buildup inside the dash, blocked ventilation, an internal cooling fault, or a faulty thermal sensor reporting a false h...

Join TaT to view the complete code information and diagnostic details.

Quick Facts