Code Definition

B2557 — Left Power Sliding Door Open/Close Output Circuit Short to Battery

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

About B2557

B2557 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 B2557 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; and 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 B2557 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 control module operates the left sliding door open and close motor output via internal H bridge or motor driver circuitry that can supply battery voltage or ground to either side of the motor. The module monitors output voltage feedback to verify the motor commands are responding correctly. DTC B2557 sets when the module detects that the left power sliding door open or close output circuit is being held at battery voltage when it should not be, indicating a short to battery in the wiring or downstream motor load. When this code is set, the left power sliding door may fai...

Join TaT to view the complete code information and diagnostic details.

Quick Facts