Code Definition

B2146 — Seat Recline Motor Position Out of Range

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

About B2146

B2146 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 B2146 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 B2146 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

DTC B2146 is set when the seat control module detects that the position signal returned from the recline motor or recline position sensor is outside the expected operating range, either electrically below the minimum valid value or above the maximum. The seat module uses position feedback from each motor to control seat travel, store memory positions, and prevent the motor from driving past its mechanical end stops. The recline position is typically reported by a hall effect sensor on the motor, a potentiometer, or counted motor pulses, depending on the platform. When this code is set, the rec...

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