Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chrysler >> 2005 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Electronic Control Modules - Electrical Diagnostics) >> DTC Troubleshooting >> U0164-Lost Communication With HVAC Control Module >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2005 Dodge Magnum and 2005 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
CAN B BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
A/C HEATER CONTROL
A/C HEATER CONTROL POWER AND GROUND
MODULE THAT SET THIS DTC