Code Definition

B2529 — Left Rear Turn Lamp Circuit Failure

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

About B2529

B2529 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 B2529 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 B2529 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) controls and monitors the left rear turn lamp circuit, providing the flashing output for both turn signal and hazard warning operation. DTC B2529 is set when the BCM detects that current flow on the left rear indicator output is outside expected parameters, indicating an open circuit, short, or failed bulb. The BCM uses circuit feedback to determine bulb integrity, and many vehicles will also produce the fast flash or hyper flash symptom on the cluster when a turn lamp fault is detected. When this code sets, the driver may notice the left rear indicator failing to...

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