actually, the tps sensor can cause the vehicled to act as if the tranny was slipping. past experience with this sensor tells me that when you step on the gas the car barely accellerates until it randomly takes off, making the impression that the tranny slipped. I suggest you invest the $ for the sensor. it should be less than a 100 bucks, but if you install it yourself and the code still comes on take it in to get the sensor adjusted because somtimes the voltage can be off.