Code Definition

P0929 — Gear Shift Lock Solenoid Circuit Range/Performance

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

About P0929

P0929 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 P0929 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 P0929 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 P0929 fault code is triggered when the control module detects a range or performance issue in the gear shift lock solenoid circuit. This circuit controls the solenoid that locks the gear shift mechanism, which is a safety feature to prevent unintended gear shifts, such as moving out of park without proper brake engagement. A range or performance issue in this circuit suggests that the solenoid's operation is not within the manufacturer's specified parameters or is not functioning efficiently. Causes could include a malfunctioning gear shift lock solenoid, problems with the electrical conne...

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