Rear Heating Ventilation Air Conditioning (RHVAC) Module DTC Chart

WARNING: This page is about a different car, the 2015 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This module utilizes a 5-character DTC followed by a 2-character failure type code. The failure type code provides information about specific fault conditions such as opens or shorts to ground. Continuous Memory Diagnostic Trouble Codes (CMDTCs) have an additional 2-character DTC status code suffix to assist in determining DTC history.

NOTE: Some PCM DTCs may inhibit A/C operation. If any PCM DTCs are retrieved, diagnose those first. Refer to the PCM DTC Chart .

DTC	Description	Action to Take
U0140:00	Lost Communication With Body Control Module: No Sub Type Information	GO to Pinpoint Test Z .
U0164:00	Lost Communication With HVAC Control Module: No Sub Type Information	REFER to Module Communications Network to diagnose lost communication with the HVAC module.
U0422:68	Invalid Data Received From Body Control Module: Event Information	RETRIEVE and REPAIR all non-network DTCs in the BCM. REFER to Multifunction Electronic Modules DTC Chart.
U3000:41	Control Module: General Checksum Failure	INSTALL a new Rear Heating Ventilation Air Conditioning (RHVAC) module. REFER to Auxiliary Climate Control .
U3003:16	Battery Voltage: Circuit Voltage Below Threshold	GO to Pinpoint Test G .
U3003:17	Battery Voltage: Circuit Voltage Above Threshold	GO to Pinpoint Test G .
All Other DTCs	-	REFER to Multifunction Electronic Modules .