The "Service Engine Soon", "SLIP" and "TCS Off" lights won't turn off, on my dashboard. The engine shakes the whole car. Not violently, but quite noticably. Once in a while the Service Engine Soon light kinda flashes on and off for a minute or two, then stays lit. I've brought it to my local repair shop (where the guy who sold it to me works) and they've hooked it up to a computer and reset something 3 times now, and it never fails to keep happening the 2nd or 3rd time I start the car. Anyone know what's goin' on here?