Code Definition

B2135 — Park Brake Applied Warning Lamp Circuit Failure

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

About B2135

B2135 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 B2135 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 B2135 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

B2135 is set when the body control module (BCM) detects a circuit fault on the park brake applied warning lamp output. The park brake applied warning lamp is the dashboard indicator, typically a red BRAKE icon or parking brake symbol, that illuminates when the parking brake is engaged, when there is a low brake fluid condition, or in some vehicles when a related brake system fault is detected. The BCM drives this lamp directly and monitors the output for the expected current draw and voltage feedback. When the BCM detects an open circuit with no current when commanded on, a short circuit with ...

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