Ford P1688 OBD-II Trouble Code Definition: P1688 Internal Fuel Injection Pump Controller Failure P1688 Ford OBD-II Trouble CodeDescription: Chrysler OBD Trouble Code P1688 Internal Fuel Injection Pump Controller Failure Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. PSA OBD Trouble Code P1688 Metering Oil pump stepping motor circuit malfunction Sorry no other information,Please […]