Possible Sources

WARNING: This page is about a different variant/trim than selected.

Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
Communication error
Low battery condition
Battery recently replaced
BCM fuse 71 (10A)
HVAC module
PCM

DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
U0164:00	Lost Communication With The HVAC Module	After the PCM , HVAC module wake up the PCM did not detect a response from the HVAC module.