Code Definition

P0912 — Gate Select Actuator Circuit Low

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

About P0912

P0912 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 P0912 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 P0912 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 P0912 fault code is set when the transmission control module (TCM) detects a low voltage condition in the gate select actuator circuit. This circuit is responsible for controlling the left/right motion of the gear selector in vehicles with manual or semi-automatic transmissions. A low voltage condition suggests an electrical problem where the voltage in the circuit falls below the normal operating range. This can lead to insufficient operation of the gate select actuator, resulting in improper lateral movement of the gear selector. Consequently, this can affect the vehicle's ability to eng...

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