Information about the immobilizer

2004 model 307 xr 1.4 hdi My vehicle & nbsp; the remote control key was working the car, but it did not open and close the doors 2 days ago, I brought it home, I removed the battery, I measured the voltage of the battery, there was no problem, then I put it back and collected the key in the morning, I went to the car, the doors were okay, the remote control was working, click, but when I started, I came across a big surprise, my car was not working. but it did not work, I did not click on it, then I tried with a spare key. It worked in a single starter. I am confused, the key does not start the vehicle, but the doors open and the door does not do so if the key is broken, both from the remote control and the normal keyhole.
This The solution to my problem would be the healthiest service, or I would have my new key outside, and I would be delighted if there was a great cost difference between them.

it is normal for the key to open the door .... immediately after starting with the backup key, start with the old key ... it will work with it with the information of the previous key ... then stop again run with the old ... then try to run with the old key again after 10-15 minutes if you have any problem there is no use .... by the way, it is also useful to tighten the contact spray .... if there is no room, you may need to re-code the key ... you do not have to do this in the service. If you request the car when you leave it for maintenance, they may do it for free.

After running with the backup key, I immediately installed & nbsp; the old key worked, then I waited a little bit again, it did not work.