OBDII not reading codes
 

Hi,


I have a 2008 cooper sidewalk edition convertible. I have the common problem of ABS lights and triangle with exclamation point. In the mornings when I start the car no lights show up the after 2 minutes of driving softly the brakes vibrates and make a grinding sound. Then the 2 lights come on and the car seems to run fine afterwards.

I bought an OBDII scanner and no codes woulds come up. I took it to my mechanic and he had a more professional scanner and he couldn't pull any codes either. He thought it may be the ABS pump or that the computer is bad.

What are your opinions please. how hard is it to change the computer and kind should i get, (i've seen aftermarket types)

Thanks!