Code Definition

B2565 — Right Tail Lamp Circuit Failure

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

About B2565

B2565 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 B2565 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 B2565 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) or lighting control module monitors the right tail lamp circuit for proper operation, checking for normal current flow when the lamp is commanded on and detecting any open or shorted condition that would indicate a fault. DTC B2565 is set when the module detects a circuit failure on the right tail lamp output, such as an open bulb, an open wire, a high resistance connection, or a short circuit that prevents normal operation. Modern lighting control uses smart drivers that can detect bulb out conditions and circuit faults via current sense feedback, providing preci...

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