i just have a simple hand held scantool that reads codes and sensor data....it works great on my Gn, but on my new T the values are ok for about 2 minutes, then they go nuts!! i mean everything bounces around, rpm, temp, iac, tps, o2's, even the proom id!!! as far as the car itself, what could cause this? i know its not the tool, because i use it on my GN and other cars all the time.