Daewoo Lanos starter problem 1.4

Hello friend, it is logical that the velosity sensor is not working, it is necessary to check well, the sensor is damaged in the lady but it is also very common that the velocimeter pinion is damaged because it is of paste it is necessary to check first before buying the sensor the pinion is where the sensor is screwed. Or you have to take out the fault codes.

Well I tell you how my car is going.
Take it to the official Daewoo concessionaire and after several days, they call me saying that they have put the scanner and it comes out that he has immobilizer failure, I tell them that they repair it and the few days tell me that they mounted the immobilizer and the car starts for about twenty minutes and that it turns off again and now they tell me that it is the ECU plant that is bad, that you have to change it and it costs only this piece more than 900 euros.
They tell me that if I can get it second hand and that they ride it.
I'm made a mess because I don't know what I'm going to do. I hope you guide me about the most appropriate thing I have to do because the repair I think it would exceed 1,500 euros.
Well I want to thank all your councils and worry with my problem.
Greetings ……… Jomadu

If you get one in Desgaja you can program it or you can condemn the address of someone who eliminates the immobilisator so that it never passes again.