Ford P1321 OBD-II Trouble Code Definition: P1321 Electronic Ignition System Fault Line P1321 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P1321 Electronic Ignition System Fault Line Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. OBD Trouble Code P1321 Ignition Coil.4 – Abnormal Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. […]