Fault Code 3749 on ISX15 2350

[tree98]

Go to quickserve.com and open an account with your engine serial number it's free. Next you click on the service tab and youll see a place to enter that code you got(3749) it will tell you conditions for setting that particular code and "shoptalk"will tell you possible causes. Click on "troubleshoot code 3749" and it will take you to a series of troubleshooting steps.
That's where you need to start. If you have questions or get stumped come back here and post what problem you ran into.
Blindly throwing parts at it can get expensive, ^^^^ this is a better way