Ford C1721 OBD-II Trouble Code Definition: C1721 Air Suspension Height Sensor Power Circuit Open C1721 Ford OBD-II Trouble CodeDescription: OBD Trouble Code C1721 Air suspension height sensor power circuit open Sorry no other information,Please help us to improve,Any information is appreciated.Thanks. OBD Trouble Code C1721 Left Rear Damper Actuator Short Circuit to Ground Sorry no other […]