DTC U0423-68: Climate Control Unit (Full-Auto Air Conditioner): Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0423:68 (CLIMATE CONTROL UNIT - FULL-AUTO AIR CONDITIONER) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Invalid data received from instrument cluster
Detection condition	The climate control unit receives error signals from the Instrument cluster
Fail-safe function	The value of the error signal is fixed at the specified value.
Possible cause	Instrument cluster malfunction Climate control unit malfunction
System wiring diagram	Not applicable