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U0164
Sistema
Network (CAN Bus)
Scanner richiesto
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.

Sintomi comuni

  • Rear climate inop
  • Temperature sync issues

Cause tipiche

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

Di quale scanner hai bisogno?

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

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono di solito uno scanner full-system.

Consigli diagnostici

  • Registra il freeze frame quando compare il codice
  • Cancella il codice solo dopo aver risolto la causa
  • Controlla codici pending correlati
  • Verifica che la batteria sia sopra 12,4 V prima di sospettare i sensori

Scanner TOPDON consigliati

Domande frequenti

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.