C1820 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1820 – Air Suspension RF Air Compress Request Exceeded Max Timing


C1820 Possible Symptoms


Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)


C1820 Possible Causes


Faulty Air Suspension Height Sensor,Air Suspension Height Sensor harness is open or shorted,Air Suspension Height Sensor circuit poor electrical connection,Faulty Vehicle Dynamics Module (VDM)


C1820 Description


The Vehicle Dynamics Module (VDM) monitors the Air Suspension RF Air Compress. The VDM sets the OBDII code when the Air Suspension RF Air Compress is not to factory specifications.