CM871 High DOC temp during regen

[tariqzai]

Hi everyone, I have regen issue with my 2009 Volvo with CM871. During Regen instead of DOC temp staying steady and DFP temps going up, this engine shows DPF outlet temp staying steady while DPF intake and DOC temps keep going up (1000+). I have this truck for 3 years and every forced regen i did was successful and most of the time DPF differential pressure would be zero after the regen. Problem started few days back when DPF intake and outlet temp will not go higher than 600 and dosser injector was staying off all the time, I replaced the dosser injector and now dosser injector opens but instead of heat going through the DPF intake and outlet, data shows high temp on catalyst and DPF intake, while DPF temp stays around 550-600. Looking at the temps data during regen it appears like DOC and DPF outlet sensor connections are swapped, I checked these sensors physically on both filters and these wires are too short to be hooked up to the wrong connector. I will really appreciate if anyone can help me with this. (I have pulled the DOC and DPF filters and both appear clean)
Thanks
Tariq