I need advice ford f150 computer

[thorus]

Hello!

I have computer problem in a 2000 Ford F150 XL.
My car cannot pass the smog test because the car computer do not work.Must be replaced or reflashed.
I have transmission issue in my car. Computer failure may be the cause.
Where I can do that?
How much will cost each of the two types of repair?
Where must go with the car?

I live in Van Nuys, CA.

Thank you!