A gear shift reverse actuator is a component that helps to engage and disengage the reverse gear in a vehicle and is responsible for shifting the transmission into the reverse gear. It is typically used in vehicles with automatic transmissions and is responsible for moving the shift lever into the reverse gear position when the driver selects reverse.
Your scanner will detect the P0925 trouble code when the powertrain control module (PCM) or engine control module (ECM) detects an abnormal voltage reading from the Gear Shift Reverse Actuator Circuit.
The vehicle’s transmission control module typically controls the actuator, which receives input from the driver through the gear shift lever or a button on the dashboard. When the driver selects reverse, the transmission control module sends a signal to the actuator to engage the reverse gear. The actuator moves the shift lever into the reverse gear position, allowing the vehicle to move backward.