Lost Communication with HVAC Module
Communication with the heating and air conditioning module has been lost.
Informational only. Consult a qualified mechanic.
- Faulty HVAC module
- Wiring issue
- Connector corrosion
Climate control may not function. Have module inspected.
What does U0164 mean?
The U0164 OBD-II diagnostic trouble code (DTC) indicates: lost communication with hvac module. This is a low-severity network code that your vehicle's onboard diagnostics system triggers when communication with the heating and air conditioning module has been lost. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
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