Ford C1221 OBD-II Trouble Code Definition: C1221 Lamp ABS Warning Output Circuit Short To Ground C1221 Ford OBD-II Trouble CodeDescription: OBD Trouble Code C1221 ABS lamp warning output circuit short to ground Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. OBD Trouble Code C1221 Left Front Wheel Speed Sensor Input Signal is 0 […]