What Causes an Automatic Transmission Car to Fail to Shift Gears?

[DelCamille]

Automatic transmission cars may fail to shift gears due to solenoid valve failure, gear lock malfunction, or battery issues. Below is a detailed explanation of the causes: Solenoid Valve Failure: If the solenoid valve in the automatic transmission fails or if there is a malfunction in the brake control system, the solenoid valve needs to be replaced. When the gear cannot be shifted, avoid forcing the gear lever. Gear Lock Engaged: Some automatic transmission vehicles are equipped with a gear lock switch, primarily used to force gear shifting when the car has no power or to prevent the vehicle from rolling. Accidentally activating this switch can lock the gear. Locate the "shiftlock" button to perform the unlocking operation. Battery Depletion: A depleted car battery can also prevent gear shifting. Check if the car's lights and dashboard are functioning normally. If they are not working properly, it indicates that the car's battery is depleted. Simply recharge the battery to resolve the issue.