I have a 2002 a4 quattro that seems in perfect running condition. it will not pass inspection because of a check engine light being on and ABS light being on. My mechanic put it into computer and a torque converter code shows. There does not seem to be any issues with that when car is driven. The car drives perfectly....I am going crazy! Has anyone ever has these issues before with engine lights coming on for no reason??? CAN it be a sensor?? Please help!