PLEASE HELP!

I read the whole 9 pages. recently another o/o had his volvo, a 2015 in and the techs replaced the injectors. Which I thought was not the issue, but he wasn't going to argue. The issue's with the truck were no parked regen and only a sporadic passive regen. Lack of power sometimes and the truck would go into derate and then it would clear. You had said you had cleaned and replaced the DPF filter and had the SCR checked. you also said that you had crystalization in the DOC. Did you have any by the Doser valve. The doser valve sprays def fluid to help capture soot and the 7th injector sprays fuel behind the turbo to heat. Could you have a faulty doser valve or insufficient def fluid going to the doser valve. If you had soot build up when the truck was running but then it would go down. My thought on it, the others here have far more knowledge than I have on this. But in all the replies I haven't seen anything about the doser valve which is supposed to be replaced yearly.

Good luck

 

You might have a bad wire between that sensor and ACM. Now with a new egr valve after regeneration does your soot level goes to zero or still at 10% or higher?? Recently had 3 codes one was for egr cooler mechanical failure other 2 was for egr temperature sensor incorrect reading, was reading almost the same temp like an exhaust but intake temperature would be showing normal. By wiggling the connector and a wires for that sensor reading come back to normal. I will need to replace engine harness soon. Egr cooler and a temp sensor are 6 months old.

 

With a sensor mounted pins are numbered from top to bottom 1 2 3.
1 Supply wire 5V
2 Ground wire
3 Signal wire.

 

1-50, 2-54, 3-26