vehicle ecm keeps reporting an error code p2138 that refers to a correlation issue between sensors on the throttle/pedal system, causing the vehicle to enter into reduced power and eventually disables engine. Problem persists even after replacing pedal component. Apparently water enters the compartment where the part is located and corrodes wiring between the ecm and the pedal system. GM is apparently aware but so far has done nothing. Problem is especially hazardous because engine power is reduced during acceleration and happens without warning. Vehicle could be in high density traffic and then suddenly experiences lack of power or total disability, and driver must try to navigate to the side of the road—not always possible or safe to do.