Cummins isx cm871 fault 2637

[Mrt800]

(10-31-2022 )Mr Hagg Wrote:  A few things one looks like you maybe using oil looks soot plugged from oil to me... Then as far as heat to start regen could be a few things. Dosed may not be dosing fuel, doc maybe bad and will not ignite fuel or turbo is no good and will not cause enough back pressure to create heat. Could also be Doser injector tip is sooted over.

It’s a new doser, Yes it’s using some oil I’m going to pull the exhaust manifold like
someone mentioned on the thread. Or maybe just replace the valve seals . I’ve had the valve
tool for three years ,I think it’s time to use it. I guess it won’t hurt.