CHEVY 1500 (4.8L): RESETTING THE THROTTLE/PEDAL POSITION SENSOR.
2007 Chevrolet Silverado
January, 7, 2012 AT 1:11 AM
Getting an occasional check engine light. Goes on and then goes off. My OBDII reader says: "Throttle/Pedal Position Sensor A circuit Performance". My parts guy says that it is a total replacement of the pedal, but the sensor can be reset by the computer. Do you know how to do that?
Throttle position sensors on the normal fuel injection systems are not adjustable, do not need to be adjusted, and do not magically get out-of-adjustment. If you have the insanely dangerous "throttle-by-wire" system that put Toyota in the news, you do not want to monkey with that yourself. Anyone who touches it will be a party to the future lawsuits which we know are coming.
Regular throttle position sensors set fault codes when their signal voltage goes below 0.5 volt or over 4.5 volts. Usually that occurs from a worn spot in the sensor element itself, but a loose or corroded terminal in the connector, a cut wire, or a corroded splice can cause the same thing. The TPS gets its 5.0 volt supply and ground on common wires that feed other sensors. A corroded splice can set fault codes too.