Cummins x15 with paccar fuel filter

On the diagnostic screen it says faults found to hook up with computer, on the warnings screen it says no warnings. When I would idle yesterday the rpm would be at 800 when normally its 700 I did few more priming cycles went back to normal like I said its running normal is connecting it only way to delete check engine light? What about disconnecting the battery for few minutes?

 

Also recently my fuel mileage has sucked was averting 6 mpg in flatbed now doing reefer it would normally be at 5.5 yo 5.8 around 5 if I'm fighting wind now on a lighter load barely getting 5.2 at around 66k gross I have 290k miles on my truck you think its time for an overhead? Cummins book says every 500k

 

I do idle a lot. Theres some weeks that itll do 2 to 3 times the regeneration then following week only once. I do have a heavy foot I dont let it lug especially going up hills. I have 8100 hrs on 291k miles you think I should take the dpf to get cleaned? How do you clean the egr?

 

So I got diagnostic check on the truck it came up with code 1883 aftertreatment dpf differential pressure sensor- data erratic, intermittent, or incorrect. The sensor reading an erratic value at initial key ON or during engine operation. They deleted it 2 hours down the road I turned off the truck for a break now I turned it on check engine light turned on again. I'm assuming while loves was trying to turn on the truck it fried the sensor? Is it a easy fix?

 

They were really cranking on the ignition where it would get to the point was losing electricity probably fried the sensor? I'm going to buy the sensor never once before I had the check engine light that's why I was blaming loves I still have warranty on my truck but not sure to take to dealer since they last too long to check it out