Security system locked my car after replacing PCU

Hi Joyce,

When you say PCU are you referring to the PCM? If so, you cannot just replace this part. It requires you to program the replacement module. I attached the process on how to do this. It requires the use of a scan tool so if you don't have one then you will need to have a shop program it for you.

However, you are correct in that the vehicle thinks it is being stolen so it locks out operation until until it is programmed properly.

Please let me know if I am missing something with what your issue is. Thanks

im sorry i meant the PCM (brain). i had it programmed and 2 keys, to my cars VIN # and part # of the PCM, was there another part i needed to have programmed too? when i had the keys cut for my ignition one key wasnt cut deep enough so i took it back to have it re cut, it fits now. i was told that is my problem. i cant believe that to be so.

Okay. That is good, but we just need to be sure they loaded the programmable memory into it. They do this when it is on the vehicle. Take a look at that first attachment and read under the Manual data section. Part of this information that is loaded into it is not only the VIN but the key information.

I suspect the best option at this point is to have a scan tool hooked to it and see if they are able to communicate with the new PCM. If they can, then they should be able to determine if it was properly programmed. If not, they can do it.