my 05 was giving me a " service traction control" message every time it got over 125-130k. It seemed to be getting worse. The code on the scan was c0561-71 reads system disabled Information stored, Invalid Data received. As it turns out, my mass airflow sensor was setting this off. Replaced the mass airflow sensor and no more code or service traction control message. I am posting this just in case someone else runs I to this issue. i was told that c- codes are usually abs codes and p codes are engine related. So in this case the mass was causing the problems and seems to be just fine now.