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2017
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Express 2500 LS, 4.8L Eng VIN F
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Repair and Diagnosis
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Engine Performance
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System
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Data Communication System
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Diagnostic Information and Procedures
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DTC U1865: Fuel Operated Heater Lost Communication with Engine Control Module
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Conditions for Running the DTC
Conditions for Running the DTC
The system voltage is between 9 - 16 V.
The vehicle power mode master indicates that the need for serial data communications.