Chrysler Repair: Why is tps voltage high (p0123 code)?, screw holes, volt supply

Question
hi roland,
         light on (typical)well egr was bad,then i replaced it.light went off. then tps came up (dam it)lol. then 43. multiple misfire.
                well erased codes now the only code is p0123. voltage to high.(tps)how can i fix this. the adapter to the sensor is putting out 4.5 volts.but dummy me didnt check out put on sensor it self.but if it is fine do i have to adjust it. when i put the new tps on i had to kinda turn it slightly in order to line the screw holes up.does it matter that the mec .. on the sensor is turned a few degrees?
                                     mark
                               milwaukee,wi

Answer
Hi Mark,
I don't believe that turning the sensor slightly would cause the high voltage fault code, unless it damaged the wiring of the internal potentiometer (However the reading might not be accurate, but it shouldn't be that far out of line as to cause this code). The signal wire is either brown/red or orange dark/blue (you didn't mention which car you have) and the fault code occurs when it reads higher than 4.5 volts (assuming a 5 volt supply) and that sort of voltage is associated with a wide-open throttle! (Closed throttle reading is supposed to be 0 volts).
So either the sensor is damaged or that wire is shorted to the supply wire (dark green/yellow or violet/white). So I would check the resistance readings between the center (wiper) and either end pin of the sensor (ends of the resistor) as you move the throttle valve, and shake the harness when connected and the ignition is 'on' to see if there is a short in the plug or along the way to pin 35 of the powertrain module.
I have the powertrain troubleshooting manual for most of the engines and can send you the pages that apply to the p0123 code if you can't identify the cause. Just let me know a postal mailing address and I'll xerox them.
Roland