Code Definition

B2136 — Park Brake Applied Warning Lamp Circuit Short To Battery

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

About B2136

B2136 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 B2136 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 B2136 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) monitors the park brake warning lamp drive circuit between itself and the instrument cluster to confirm the lamp can be commanded on when the park brake is applied. DTC B2136 is set when the BCM detects voltage on the lamp drive output that is higher than expected, indicating the circuit has been shorted to battery voltage. The lamp drive is typically a low side switched output, so battery voltage appearing on the line prevents the BCM from controlling the lamp state and may stress the driver transistor inside the module. When this code is set, the park brake warn...

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