Have recently replaced the egr valve, the throttle positioning sensor, transmission selector switch, and the egr tsp low voltage code still will not go away. Several mechanics from differnt garages. Have looked at it, and have their recommendation on what to do, have done it and still the code is there. Based on what we have figured out there possibly was an electrical fire at one point or something to why there has been a major wire overhaul b4 the vehicle has come to my hands. The vehicle is in good shape except for figuring this problem out. The light that eliminates when the shifter is in drive, does not work. So possibly the transmission is not getting that the vehicle is in fact in D. When you push the accelerator for more power, it's not tellin the transmission to drop a year to give more power. It stays where it is. Its not doin what it should somewhere, just not sure what else to look at other than completely gettin into all of the wires to check them all individually. Was hoping someone May have run into this or a similar problem and has come out sucessfully and has some recommendations as to where to proceed from here. Thank you in advance.