Reoccurring regen t800 mx13

Inspect the DPF pressure sensor tubes. Make sure everything is clear of obstruction and kinks, properly routed. DPF pressure sensors fail in range often. If it is not new replace it.

Other than that, need to see faults.

 

All new sensors are not mandatory. But the DPF pressure sensor is most common for your symptoms of regen requests after recent cleaning.

 

You could while you’re in there. Temp sensor rationality is easy enuf to check with Davie.

 

Also another common issue is the EGR and/or doser can clog and become obstructed and let enough soot in to trip the sensors. I would take an eyeball at those as well while your in there fiddleing around with things if the sensors dont work. Ive had 2 diffrent EGRs break at the valve door so it would not fully close and allow buildup in the system, so i would physically ensure its not broken as the test will show good if the spindle comes off the door. The doser can partially clog and let some def out so it reads good bit still not properly treat the system as well leading to tripping sensors.

 

The soot level is estimated by comparing the pressure before and after the filters. A faulty EGR valve isn't reading higher because it's plugging up from extra soot, it's reading higher because the exhaust flow is being affected.

A plugged DEF doser is going to create SCR/NOX codes, not soot level codes.