What Are the Reasons for Being Unable to Shift Gears?

[LaNevaeh]

The reasons why a car cannot shift gears are as follows: 1. No fuel: The fuel gauge shows below the red line, naturally making it impossible to start. 2. Dead battery: This may be due to a drained battery caused by leaving headlights on for too long or the battery reaching the end of its lifespan. It is generally recommended to replace the battery every 2 years. Additionally, installing xenon headlights, high-power audio systems, or DVD players can also cause vehicle circuit failures. Checking for a dead battery is simple—just press the horn. 3. Incorrect gear position: For automatic transmission cars, the gear must be in P (Park) or N (Neutral) when starting. If it is in R (Reverse) or D (Drive), the car will not start. Some manual transmission cars also won’t start if the clutch is not depressed. 4. Lack of antifreeze: Some car owners use water or low-quality antifreeze, leading to the entire cooling system freezing in extremely cold winter conditions. This can crack the engine, render the water pump inoperable, prevent the car from starting, and damage other engine components. 6. P-lock solenoid valve failure: For safety reasons, to prevent accidental shifting into other gears when starting the vehicle, a P-gear solenoid valve is installed. This solenoid valve requires a signal from the brake pedal to release. These two components are interconnected, so a failure in either one will prevent the gear lever from being moved out of P to other gears. 7. Gear lever assembly failure: Internal gear wear in the gear lever can cause it to get stuck, making it difficult to move forward or backward, resulting in an inability to shift gears or difficulty in shifting. 8. Incomplete clutch disengagement: This may be caused by a faulty clutch disc or pressure plate. Typically, the clutch three-piece set—friction disc, pressure plate, and release bearing—needs to be replaced.