Part of the generic C1660 overview — this page covers the Hyundai meaning specifically.
OBD-II Diagnostic Trouble Code
C1660
Receiver hardware failure
C
Chassis
brakes / steering
brakes / steering
1
Mfr
manufacturer code
manufacturer code
6
Chassis subsystem
60
Receiver hardware failure
Severity · general guide
High
Brakes/steering — inspect soon
Code type
Hyundai
System
Chassis
Model
Tucson
Years
2021