Code Definition

P0906 — Gate Select Position Circuit Low

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

About P0906

P0906 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0906 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0906 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 P0906 fault code is set when the transmission control module (TCM) detects a low voltage condition in the gate select position circuit. This circuit is responsible for monitoring the lateral (left/right) position of the gear selector in vehicles with manual or semi-automatic transmissions. The code indicates that the voltage in the circuit, which is essential for transmitting the position of the gear selector to the TCM, is below the expected range. A low voltage condition in the gate select position circuit can lead to inaccurate or unreliable reporting of the gear selector's position, po...

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