The remote control key can open the door but cannot start the car. What should I do? Why can't the remote control key open the car door?

There are two types of keys for opening car doors: remote control keys and mechanical keys. Remote control keys have wireless central control functions and can open and lock the door from a distance, so they are more commonly used. So what should I do if the remote control key doesn't open the car door?

What should I do if the remote control key can open the door but cannot start the car?

If the remote control key can open the car door but cannot start the engine, in addition to the possibility of chip damage, it may also be related to a failure of the remote control key or key anti-theft control system and a steering lock failure.

First, check how the car was unlocked. If it was unlocked directly with the key, try to unlock it again with the remote control. Then stick the remote control key to the ignition switch position to see if the ignition switch can be turned to the ON position. Also, pay attention to whether the anti-theft indicator light on the instrument cluster is always on. If so, try to re-match and register the remote control key with a dedicated diagnostic computer.

If the key chip is damaged, you need to go to a 4S shop or a larger auto repair shop to pair the key chip and rewrite the chip program.

Why can't the remote control key open the car door?

The most common reason is that the remote control key is out of power or the battery is exhausted after the vehicle has been parked for a long time, so the door cannot be opened with the remote control key. Some installed electrical anti-theft devices may fail, and the remote control key may be dropped or dropped into water and damaged.

Generally, there is an indicator light on the remote control key, which will flash when we press a button. If the indicator light does not flash, it means that the remote control key is faulty, the battery may be dead, or there may be a problem with the remote control itself. At this time, you need to replace the battery or change a key.

If you have changed the key and still cannot open the car door, check whether the car's hazard lights flash when you press the unlock button on the remote control. If they do not flash, it means the car has not received the unlock signal. If they flash, it means the car has received the unlock signal. If it still does not unlock, you need to check the car itself.

In addition, in winter, when the temperature is low, the car door locks are frozen and cannot be opened with the mechanical key. If the mechanical key can open but the remote control key cannot, it means that the fault is still in the electronic control part.

If the car door lock is frozen, the best way is to blow it with a hair dryer, which usually takes a few minutes. But never use hot water, otherwise it will freeze again after a while after being opened temporarily, and in serious cases, the car door may not be closed.

Reasons why the remote control cannot open the car door

1. The power of the remote control key and the battery is too low;

2. The buttons are not responsive, the remote control key is abnormally damaged, etc.;

3. The anti-theft system fails;

4. The surrounding environment has strong signal interference sources or is shielded.