Code Definition

B2603 — PSD Not Fully Closed During Self-Test

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

About B2603

B2603 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.

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 B2603 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 power sliding door (PSD) control module runs a self test of the door system that checks latch position, motor operation, and overall door status against the inputs it expects. DTC B2603 is set when, during this self test, the module determines the sliding door is not fully closed and latched at a point where it should be secure. The module relies on the latch ratchet and pawl position switches and the door ajar input to verify closure. The code can mean the door is genuinely not fully cinched because of a latch, striker, or track problem, or that a faulty switch or wiring is reporting a fa...

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