Ford P1661 OBD-II Trouble Code Definition: P1661 MIL Control Circuit P1661 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P1661 MIL Control Circuit Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. PSA OBD Trouble Code P1661 Output circuit check signal Low Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. OBD Trouble […]