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Home >> Jeep >> 2009 >> Commander Limited, 4.7 P, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Front Control Module (FCM) - Electrical Diagnostics >> DTC Troubleshooting >> U0164-Lost Communication With HVAC Control Module >> Possible Causes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Possible Causes

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 POWER AND GROUND
A/C HEATER CONTROL
MODULE THAT SET THIS DTC
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