Zoeken
U0164
Systeem
Network (CAN Bus)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with HVAC Control Module B

Understand U0164, common causes, and the right TOPDON scanner to diagnose it.

Secondary HVAC module offline on dual-zone or rear climate systems.

Veelvoorkomende symptomen

  • Rear climate inop
  • Temperature sync issues

Typische oorzaken

  • Rear HVAC module fault
  • CAN wiring in console
  • Low voltage

Welke scanner heb je nodig?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen TOPDON scanners

Veelgestelde vragen

What does U0164 mean?
U0164 indicates lost communication with hvac control module b. Secondary HVAC module offline on dual-zone or rear climate systems.
Can I diagnose U0164 with a basic code reader?
U0164 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for U0164?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0164?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.