2020 t680 kenworth that had 446k miles derates every week.

Should’ve deleted the first emission issue u encountered, when these emission trucks start giving u emission problems, they almost never go away, they turn into a money pit

 

I mean you could fix it. Just saying. I don’t know what all you have done, but they really aren’t too complicated. All the sensors probably need a good cleaning, the dpf’s either need a good washing or replacing.

You can delete if you want, but be careful. If it’s a hack job you will be eating head gaskets like tic tacs. The worst possible thing to do with an emissions truck is to idle. They like to be worked and worked hard.

 

In all my DPF nightmares it all seemed to trickle down to incompetent design a rushed government compliance expedited to truck engine manufacturers drowning in a legislated alphabet soup of environmental policy.
Recently it has been brought to light that the U.S Environmental Protection Agency has mandated truck engine manufacturers and the like to correct these bankrupting ridiculous designs plaguing the industry since their introduction to heavy machinery applications and the M.O.E U.S Senators and Commerce Department are not playing games !! They’ve heard our voices !!! That being said there’s many options including the industry secrets to correcting DPF derate issues,
1) Doser valves change them frequently!!
Main cause other than excessive idling of derate , basically the DPF fluid is being blocked from spraying the filter I’ve seen our Peterbilts with 80 to 300k miles without ever having one changed so filters were ruined and constant regen was required until a forced regen was the only solution to start the truck….after the doser & filter was changed it ran & started like new !
2) DPF fluid level sensors replace or by-pass sensors there are devices aftermarket that can help with this when a faulty sensor causes the ECM to tell the sensor that the DPF tank is empty when in fact it’s not

 

DEF, not DPF.

 

Just paid $1200 to clean my DPF system. Ironically, it wasn't that bad considering I rarely idle the truck the mechanic said. 1st time cleaning it at 253,500 miles. They recommend cleaning it at a minimum of 250k miles.