Code Definition

B2530 — Left Rear Turn Lamp Circuit Short to Battery

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

About B2530

B2530 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 B2530 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 B2530 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 left rear turn lamp output and expects 0V on the feed wire between flash pulses or when no turn signal or hazard is active. DTC B2530 is set when the BCM detects battery voltage on the left turn lamp circuit while it should be off, indicating an unintended power source on the wire. This typically occurs when the feed wire chafes against a constant power supply, when aftermarket lighting is incorrectly tapped into the turn signal circuit, or when an internal short develops in a lamp assembly. Symptoms can include the left turn lamp remaining illuminate...

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