So as the title states I had an issue with my cummins truck and that voltage low sensor. this had been an intermittent but ongoing issue for 2 years. in my truck it never caused any issues with power loss but likely because of the tune. but funny enough I found the issue, thought it was something else for a day or so, but that got me closer to the real problem. I found an unused sensor plug sitting on the exhaust manifold near the back of the head on the passenger side this plug appeared to be half melted I removed the pink/yel wire from the plug, and zip tied both up out of the way. issue gone.