Code Definition

B2373 — LED #1 Circuit Short to Battery

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

About B2373

B2373 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.

When B2373 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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 B2373 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 commands various status and indicator LEDs throughout the vehicle, such as security system indicator, immobiliser indicator, or audio system status, by driving low side or high side outputs to the LED circuit. DTC B2373 sets when the body control module detects voltage on the LED #1 drive circuit being held at battery voltage while the output is commanded inactive, indicating a short to battery condition. The output is normally a low side driver that pulls the line to ground when the LED is commanded on and lets the LED supply rest at battery voltage when off, so a shor...

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