This diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. The automotive trouble code P2138 throttle/pedal position sensor/switch D/E voltage correlation refers to a problem related to the throttle's ability to open and close properly. Used 2017 Mercedes-Benz AMG GLE 43 from Anderson's Rock River Ford in Rockford, IL, 61107. Call (815) 401-0493 for more information.