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Pinpoint Test D : U0164: Notes

WARNING: This page is about a different car, the 2019 Ford F-350 Super Duty and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

DTC Fault Trigger Condition-PCM 

DTC Description Fault Trigger Conditions
U0164 Lost Communication With HVAC Control Module The FCIM controls the HVAC control module functions. The PCM sets this DTC if data messages from the HVAC control module through the GWM are missing.

Normal Operation and Fault Conditions 

The HVAC control module functions are performed by the FCIM. REFER to: Communications Network - System Operation and Component Description .

Possible Sources 

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