Ford P1691 OBD-II Trouble Code Definition: P1691 Fuel Injection Pump Controller Calibration Failure P1691 Ford OBD-II Trouble CodeDescription: Chrysler OBD Trouble Code P1691 Fuel Injection Pump Controller Calibration Failure Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. OBD Trouble Code P1691 Coolant Gage Circuit Low Voltage Sorry no other information,Please help us to […]