Code Definition

B2155 — Seat Horizontal Motor Position Out of Range

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

About B2155

B2155 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 B2155 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 B2155 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 B2155 fault code indicates that the seat control module has detected the horizontal seat motor position signal is outside the expected operating range. The horizontal motor moves the seat fore and aft on its slide rails, and its position is monitored by an internal hall effect sensor or potentiometer that provides feedback to the seat control module. When the reported position exceeds the calibrated operating limits, or when the position counter does not match the commanded motor movement, the module sets this code. The driver will typically notice that the fore and aft seat adjustment is ...

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