Medium and Heavy Trucks
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Hi my name is ***** ***** I'd like to help you. Can I get your engine serial number and a full description of the code or the code number?
Code 245 is fan clutch circuit - voltage below normal or shorted low. I suspect that you will find either a wiring/harness problem with the fan clutch circuit or the fan clutch solenoid itself is on its way out. Since it sounds like an intermittent problem, I would start by inspecting the harnesses and wiring.
If the solenoid is new and you do not suspect it could be a problem, check the harness for damaged/corroded/expanded pins. Next check for continuity on the fan wires from the clutch solenoid to the ECM.
If you would like detailed information on troubleshooting this circuit I can send you the steps from the cummins manual.