Ford P1331 OBD-II Trouble Code Definition: P1331 #1 MF Signal Line Short P1331 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P1331 #1 MF Signal Line Short Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. VAG OBD Trouble Code P1331 Cyl.7-Knock Contr. Limit Attained Sorry no other information,Please help us to improve,Any information is […]