OK, dealer gave me wrong info...There are two TPS. He gave me info on the fuel pedal one. The one that is giving me trouble is the EGR assembly TPS. Evidently oil getting into the plug or into the sensor is usually the problem. There is a TSB on this issue, TSB #18607. If anyone has access to this TSB and can get me a copy I would be very grateful. It may help. THANKS!!!!