Re: "Service Traction" & "Reduced Engine Power"
If you're having TAC problems, there are no guaranteed solutions. There are throttle position sensor problems sometimes, which is serviced as part of the throttle body ususally. There have been terminal crimp problems from time to time and there have been wiring issues between the throttle body and the ECM. The problem when it occurs usually doesn't stay current very long. It fails for a brief moment and then works again. The car won't clear itself until you cycle the ignition OFF and ON, it's designed that way.
As for driving the vehicle for 3 days or 100 miles, that may sound good to some of you but there are people that freak if you put 5 miles on their car. Even if you drive it a month and a thousand miles, there are no guarantees. MK with all the codes we have and all the computer controls available to us, unfortunately you do sometimes have to go with your best hunch/guess/shotgun to try to fix the car. How do you diagnose a concern that you see for one single frame of data on a snapshot of data? I know it's fun to bash the tech working on the car and call him an idiot when he doesn't fix it, but I haven't yet found a repair person in any field that nails it 100% of the time.