Dave Flomerfelt
Junior Member
I have a 2007 6.7, Cummins with 110k miles, it runs good but keeps getting this code P0489-egr Control Circuit Low. A local mechanic he said it might be carbon in the catalytic converter and suggested running it hard to maybe blow out the carbon, which I have tried with no improvement. In general it has always run clean no smoke from exhaust. Also occasionally get P2089 another egr issue. I picked up a Haynes manual but it was not much help