Hey, just picked my car from car service, they couldn't do anything, they said that there is no connection from other modules with main module. So I came to the conclusion that main module is bad, so the question is my thoughts good or bad? problems are: ABS and brake light is always on, I changed both sensors in front, nothing happened, than gas light is on, check engine is also on and it says something about gascap. year of the car is 2007 2,0l dual vvt

 

What codes come up when scanned? If the gas cap doesn't seal properly, you will get an EVAP code.

As for the brakes, I am guessing that the fluid is in the full range in the master cylinder? If low, it will also turn on the brake/abs light. If full, you can jump out the switch to see if they go out, if so, then the switch is bad, if not then you may have a bad ABS module.