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Grand Cherokee SRT-8
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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(Front Control Module (FCM) - Electrical Diagnostics)
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DTC Troubleshooting
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U0164-Lost Communication With HVAC Control Module
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Set Conditions
Set Conditions
Set Condition:
Bus messages not received from the A/C Heater Control (HVAC) for approximately 2 to 5 seconds.