Code Definition

C0256 — Engaged gear/shift lever position incorrect signal

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

About C0256

C0256 is a generic (obd-ii standard) chassis diagnostic trouble code. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

Because C0256 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

This DTC is set by the ABS or Electronic Brake Control Module (EBCM) when it receives implausible or inconsistent gear position data from the transmission control module (TCM) or related shift position sensors. The ABS module relies on accurate gear position input to coordinate traction control, stability control, and hill hold functions. If the signal is out of range, missing, or contradictory to the expected value during vehicle operation, the code is triggered. When this fault is present the driver may see ABS, traction, or stability warning lights and those functions may be temporarily dis...

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