U0166

Lost Communication With Auxiliary Heater Control Module

DTC U0166, sometimes indicated as U016600 is an OBD diagnostic trouble code indicating a generic fault with the vehicle user network.

U0166: Lost Communication With Auxiliary Heater Control Module
U0166: Data bus, auxiliary heater control module – no communication
U0166 00: Data bus, auxiliary heater control module - no communication

DTC Trouble Code Search

Previous Code: U0165 | Next Code: U0167