Code Definition

P0931 — Gear Shift Lock Solenoid Circuit High

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

About P0931

P0931 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 P0931 is stored, the module has detected a signal or supply voltage higher 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 P0931 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 P0931 fault code is activated when the control module detects a high voltage condition in the gear shift lock solenoid circuit. This circuit is responsible for controlling the solenoid that locks the gear shift mechanism, a safety feature designed to prevent inadvertent gear shifts, such as moving out of park without proper brake engagement. A high voltage condition in this circuit usually points to an electrical fault, such as a short to power or an internal issue within the solenoid, resulting in voltage levels exceeding the normal operating range. This abnormal voltage can impair the co...

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