ABS-TRAC OF AND LOW TRACK SENSORS

Someone knows why the Abs-Trac of and Low trac board sensors are turned on and extinguished when it passes a bump or a stop or simply turning. My car is a Grand Am Se 99. It has already been checked with scanner and does not throw anything, the codes are erased but reappear. When lighting the car does not indicate anything, only in the cases I comment.

Hello, look when you put the scanner does not throw any of that because as you comment only on rare occasions and the scanner you handle it with the car in high total I suggest that you handle the car with the scanner and the car in function and checks your harnes since when time passes time or by service it will false them properly with bargos. Well the codes if there is a lucky fault and we continue in contact