Ford U1003 OBD-II Trouble Code Definition: U1003 SCP (J1850) Invalid or Missing Data for Primary Id $03 U1003 Ford OBD-II Trouble CodeDescription: OBD Trouble Code U1003 SCP (J1850) Invalid or Missing Data for Primary Id $03 Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. OBD Trouble Code U1003 Loss of serial communications for […]