Try cleaning the electrical connectors at the pump and going from the pump through the engine compartment. Maybe an electrical connector along the way?

A code like that means there is a poor or marginal electrical connection or that there is an electrical "leak" between the wires or to ground (metal in the engine compartment). Oil or gunk on an electrical connector can conduct a little bit of electricity from the connector prong to metal in the engine causing a "short" [to ground].