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Hi my name is Robert....
This is a very difficult question, the warning light can come on for many, many different reasons. I would verify all your fluid levels, if the coolant or oil level got low then it might trigger an alarm. Sometimes a plugged fuel filter will also cause the light to come on especially if the condition starts to happen more often. What you will have to do is get codes pulled, anytime the CEL goes off it will store a code, with the proper Cummins software a shop can hook up to the engine data port and see what codes are being stored. In the long run this saves time and money and will take most of the guess work out. The Cummins software also has the ability to walk the tech through possible solutions. Hope this helps some.... Robert
IF all your parameters look normal and all your fluid levels AND the light is only coming on periodically then I would drive it to Cummins. IF the fault gets more serious the light will come on and then after that may flash and de-rate the engine so you would have a little warning... Hope this helps. IF you are satisfied with my efforts please feel free to select a rating, it is the only way I get credit for helping.... Robert