CM2250 Will Not Regen

[joed2323]

(07-20-2017 )Jolt Wrote:  I've replaced the nox sensor near the aftertreatment injector about 40,000 miles ago. What happens if the plastic piece of the imap sensor is broken off into the intake manifold? Also, I smell def fluid like it's not burning properly.

You need to get that plastic piece out of the intake, do you want that going thru the valves?
Remove the intake piping, the clamp towards the air-to-air(front of truck) and the clamp on the intake piping hose that's attached to the intake manifold. You will need a 7/16 socket/rachet, and a flat head screwdriver, use the screwdriver to pry the clamp off of the hose, they normally get stuck onto the intake hose, be careful not to damage the hose. Remove the piping then get yourself a shop vac and duck tape a 1/2-3/4" coolant hose onto the vacuum and stick the hose into the intake plenum and remove the broken peice of sensor

Or you could just remove the intake manifold and clean it out:)

Are you sure it's def fluid that you smell???

Look on the ground under the truck do you see anything dripping? Follow the def fluid lines from the def injector on the scr, and follow those lines back to your def tank, do you see anything wet or leaking?

Back to what you said about you couldn't get the exhaust pipe off on the passenger side... You do not need to remove that to remove your aftertreatment injector, you will need to drain the coolant though