Having trouble shifting your car out of park? This is a common problem many drivers encounter.
In this article, we’ll delve into the reasons behind this issue and provide you with the practical solutions you need.
Let’s dive in.
Faulty Brake Light Switch
A faulty brake light switch can be one of the reasons why a car won’t shift out of park. The brake light switch is responsible for activating the brake lights and also releasing the shift lock solenoid, which allows the car to shift out of park.
If this switch fails or becomes misaligned, it can prevent the solenoid from releasing and keep the car stuck in park.
Inspect the Brake Light Switch
One possible cause is a faulty brake light switch. To diagnose this issue, have a helper monitor the vehicle’s brake light operation. If the brake lights fail to illuminate when the brake pedal is depressed, the brake switch is likely faulty. This can later be verified through testing with a multimeter.
Damaged Shift Lock Solenoid
Another possible cause for a car not shifting out of park is a damaged shift lock solenoid.
This solenoid is an electromechanical component that works together with the brake light switch to allow the car to shift out of park when the brake pedal is pressed.
If the solenoid fails or becomes damaged, it will not release the shift lock, resulting in the car being stuck in park.
Some common signs of a damaged shift lock solenoid include a humming or clicking sound near the gear shifter, intermittent issues with shifting out of park, or complete failure to shift out of the parked position.
Check the Shift Lock Solenoid
Another common reason for a car not shifting out of park is a malfunctioning shift lock solenoid. The solenoid can be tested by a qualified mechanic by following these steps:
- Disconnect the car battery.
- Remove the defective shift solenoid.
- Install a brand-new shift lock solenoid.
- Reconnect the battery.
- Field-test the new shift interlock.
Unfortunately, a shift lock solenoid can rarely be repaired and often needs replacing.
Worn Out Transmission Shift Cable
A worn-out or damaged transmission shift cable can also cause a car not to shift out of park. The transmission shift cable connects the gear shifter to the transmission, allowing the driver to change gears. Over time, the transmission shift cable can wear out or become damaged, preventing it from effectively transferring the gear shifting motion from the gear shifter to the transmission. This can lead to the car becoming stuck in park or in another gear.
To diagnose and fix issues with a worn-out transmission shift cable or any of the other causes mentioned here, it’s recommended to consult a professional mechanic for proper diagnosis and repairs.
Examine the Transmission Cable
Lastly, checking the transmission cable can also help diagnose the issue. If the cable is damaged or has become disconnected, it can prevent the car from shifting out of park.
Check the cable for any visible damage and make sure it is properly connected to both the shifter and the transmission.
Repair and Replacement Steps
Here are some quick guides.
Replace the Brake Light Switch
To replace the brake light switch, follow these steps:
- Disconnect the car’s battery to avoid any electrical issues during the process.
- Locate the brake light switch. It is typically situated near the brake pedal.
- Remove the defective switch by disconnecting the wiring harness and any clips or screws holding it in place.
- Install the new brake light switch by reversing the removal steps, ensuring proper alignment and connection.
Fix the Shift Lock Solenoid
Repairing the shift lock solenoid involves:
- Disconnecting the car battery to prevent any electrical mishaps.
- Accessing the solenoid by removing the appropriate vehicle trim and components.
- Inspecting the solenoid for damage, corrosion, or wiring issues.
- Cleaning or repairing as necessary, or replacing the solenoid if it cannot be fixed.
Replace Transmission Cable
To replace the transmission cable, adhere to the following procedure:
- Safely lift and support the vehicle with jack stands to access the transmission area.
- Locate the transmission cable in the engine bay and follow it to the transmission linkage.
- Disconnect the cable from both ends: the transmission and the shift lever inside the vehicle.
- Remove any cable support brackets or clips if present.
- Install the new transmission cable by aligning and connecting it correctly to both ends.
- Tighten any support brackets or clips, and reinstall any removed trim or components.
Preventive Maintenance Tips
Proper car maintenance is crucial in keeping gear shifts running smoothly. Drivers should perform regular checks on vital components to prevent their car from getting stuck in park.
One key aspect is ensuring the brake light switch functions correctly. A faulty brake light switch can cause the shift lock solenoid to malfunction, leading to difficulties moving the gear out of park. Periodic inspection and, if necessary, replacement, will help avoid this problem.
Keeping brake fluid levels topped up and in optimal condition is equally important. Should the fluid drop too low, the brake system might not effectively engage the shift interlock, causing the car to remain in park.
Additionally, maintaining a healthy battery ensures that the vehicle’s computer, which controls the transmission system, operates without complications.
Battery terminals should be clean and properly connected to avoid dead or faulty batteries, which can lead to gear-related issues.
Checking for blown fuses periodically can also help to prevent issues with the transmission system. Replace any compromised fuses to keep car electronics running smoothly and avoid gear malfunction.
Lastly, take care when parking on steep inclines. Engage the parking brake before putting the transmission in park to redistribute the weight on the brake assembly instead of the transmission. This simple precaution can prevent complications with shifting out of park in the future.