FUEL IN OIL 2010 CUMMINS ISC 8.3

Drifted high outlet will cause NOx efficiency codes also. Failing DEF doser/DEF volume output @ DEF doser will cause same fault.

 

I have had no luck crossing the numbers. Too many supersession on the part numbers. Leave it too the parts guys. Dont be surprised if your new part is different , there is multiple cord lengths for the same sensor type. Make sure the connector ends match. Black or grey to match the plug. They are blind but you can force the wrong one on. IE inlet on the outlet. That will really mess you up. When you pick up the parts identify inlet from outlet and write it on the box and they dont say. The inlet is usually wrapped in foil where the outlet is not.

 

Cummins P/N is right on it. 2872236 which supercedes to a 2894944RX. Quick check of price @ my local Pete dealer was 376.61with $88.00 core. Cut wires=no core.

 

I would not be worried about the amount of dried DEF I see in the photos. If indeed the outlet NOX was biased high the dosing rate could have been much higher than it should have needed trying to drive it back down to zero. This could lead to what you are seeing. But I have seen much worse for buildup of DEF.

There is no usable photos in regard to the condition of either catalyst as you can't see the media itself only the metal screens.

 

Looks absolutely normal with some crystalized DEF. Like @Goodysnap said can't see much of catalysts. Need to shine bright light in there and check for build up on the faces of the catalysts.

 

2 months ago,i had fuel contamination in oil on my dd15...mechanic told me it was my injectors,,so I replaced all 6 injectors ,cups,rails ,all kit....everything was good until now,same problem again,fuel in oil....mechanic also told me to replace the fuel pump but i didnot



It cost me fortune last time to replace all injectors,does anybody knows whats going on here?