Code Definition

B2166 — Gear select position Fault

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

About B2166

B2166 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 B2166 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 B2166 sets when the body control module or related body system module detects an out of range, implausible, or invalid gear select position signal. Where B2165 covers the primary PRNDL shift lever position, B2166 typically refers to the secondary gear select input that indicates which gear has been requested by the driver, such as a manual mode tip shift switch on the gear selector or steering wheel paddles, or a rotary gear selector dial on shift by wire systems. The body system uses this signal for instrument cluster gear display, traction or transmission mode indication, and interlock v...

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