U0164Low urgency
Lost Communication with HVAC Control Module
Network · CAN Bus
✅ HVAC inoperative. Safe to drive in mild weather. Service within 1–2 weeks.
What this means
The HVAC control module has lost CAN bus communication. Climate control, heat, A/C, and defrost will be inoperative.
Likely causes
- Failed HVAC control moduleMost common
- CAN bus wiring faultCommon
Estimated repair cost
HVAC control module$150 – $600
CAN bus repair$150 – $500
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Frequently asked questions about U0164
What does U0164 mean?
The HVAC control module has lost CAN bus communication. Climate control, heat, A/C, and defrost will be inoperative.
Is U0164 serious?
HVAC inoperative. Safe to drive in mild weather. Service within 1–2 weeks.
How much does it cost to fix U0164?
Repair costs for U0164 range from $150 – $600 depending on the root cause and your vehicle.
Can I drive with U0164?
Yes, the vehicle is safe to drive. Schedule a repair at your convenience.