Why can t an automatic transmission vehicle move without pressing the brake pedal shifter?

This is a feature designed for safety, not a fault. When the ignition switch is not switched on, the brake pedal is not depressed, or the ignition key is removed, the gear lever cannot exit from the P gear. If you need to exit, press the panic button to release the locked gear lever.

If the shift phase is not in the P position, the ignition key cannot be turned to the lock position. When the ignition switch is on, the brake pedal must be pressed to shift the gear lever from P to another gear. Because the guide pin must be extended to release the lock, the button on the gear lever needs to be pressed at the same time.

If the brake pedal is not raised and there is no resistance, you should check whether the brake fluid is missing, whether there is oil leakage at the brake cylinder, pipeline and joint, and whether the main cylinder and cylinder parts are damaged.

2.If the brake pedal is pressed to the end, the braking effect is not good, and there is no improvement in continuous pedaling, and the pedal is gradually raised, it can be judged that there is gas mixed in the brake system.

3.Continuous pedaling, pedal return is raised, the effect is improved, then the gap between the friction pad and the brake drum is too large, should be adjusted.

4.If you step on the pedal continuously, the position can be raised, and if there is a sinking feeling, there will be an oil leakage.

5.Step down the pedal, the position is very low, and then step on it, the position can not be raised, and it feels hard, then the master pump is blocked.

6.The pedal height is normal, not soft or sinking, but the brake is poor, the gap between the friction pad and the brake drum is too large or there is oil stain.

When the vehicle is ready to start, when the automatic transmission is engaged in the D gear, under the action of the torque converter, the first gear friction plate engages to generate a forward driving force, and at this time, the brake pedal is pressed to prevent this forward force, causing a slight vibration of the car. If the vibration is too large, it may be that the friction pads of the transmission forward gear are worn, and the transmission needs to be overhauled; It is also possible that the engine support or automatic transmission support pad is damaged, resulting in resonance caused by a lack of fire in the engine. Therefore, it is necessary to pay attention to the usual vehicle status so that the abnormality can be detected in time.

Because it is designed to protect personal safety, this design is just safer.

If you move it, it may cause a serious safety accident.

This is a safety control for automatic transmissions. It is a must-have function for a car with an automatic transmission.

Hit the brakes and release the brakes before the car moves.

It is a safe design to prevent accidents.

A feature designed for security.

This is a safety control for automatic transmissions.

This is a safety mechanism for the vehicle.

Designed to protect personal safety.

This is a problem with the gearbox of the car, and this is also a very serious thing, if you don't deal with it in time, you will definitely have an accident to yourself, so when we encounter this situation next to the hole, we must send the car to a professional car repair shop to repair.

If it doesn't work, there may be a problem with the transmission, a problem with the brake pedal, or a problem with the solenoid valve.

No problem, when designed, there is a lock valve under the gear lever to prevent incorrect operation and cause a car accident.

If it can't be moved, it can be the transmission that has made an achievement, or the brake pedal has an achievement or the solenoid valve has a problem.

The automatic transmission vehicle does not press the brake pedal, and the gear lever cannot be moved because of the role of the shift electromagnetic protection lock valve, which prevents the transmission from being damaged due to misoperation of the vehicle and hanging into reverse gear or parking gear during driving.

Cause analysis: This is a feature designed for safety, not a fault.

This is not to step on the brakes P gear can not be picked up. Don't step on the brakes, directly from P to D, then the car is gone, according to the speed of the car to step on the brakes, this Huizhi is passive control of the speed and, after stepping on the brakes by Sun He P hung to D, the car must not move, let go of the brake car before leaving, this is active control of the speed. For the sake of safety, the design must force the owner to actively control the speed of the vehicle.

Other gears are casually hung up if they don't pay attention to the brakes. Therefore, this is an automatic transmission car to prevent rolling, breaking into the car, and setting up a safety guarantee control method, which is conducive to controlling the speed of the car and will not make the car have potential safety hazards. When the brake pedal is not pressed or the ignition key is removed, the gear lever cannot be withdrawn from P gear.