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Excessive Regen Solution

tangowhsky

tangowhsky

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Howdy all. I've done several things suggested on here or youtube and I continually get P0299 and often P2459 codes. I started tracking how often it went into regen and it was between 25-50 miles (round trip to work is 22 mi) so it literally does this every other day and takes two days to complete!

Finally, today I took it to the dealer. They say they found the problem and know how to fix it. They say the P0299 is because the air filter. I cleaned a good oem out well and have also put the napa gold (that's in it now), but they are talking about the glue strips and it's too narrow for the airflow, so....yea.

The diagnosis for the excessive regens is this: the fuel pump (at the fuel tank) has an issue. They said it's not creating enough PSI and the fuel tank shows contaminants. This is not allowing enough fuel to be injected during regen to burn off the suit, therefore having never completed a real full regen. This sounds fairly plausible, but I've never read this diagnosis at all online.

Of course, the fix they suggest is; new air filter, fuel filters, fuel pump, tank flush and shop regen that is gonna run near $1,900 :oops:, so turning to y'all before I go this route. I'd likely purchase the parts online way before paying their markup, but anybody do this exact thing to fix the excessive regen problem and it actually work???

thanks!
 
Sounds like they are blowing smoke. I swapped out to OEM air filter, 3 fuel filter changes, towed the camper at least monthly, but nothing changed. Like you constant regen, and the dealer didn't have a clue. Ended up trading it out, and went back to a 6.4
 
It’s cheaper to purchase a fuel pressure guage and determine if the fuel pump is going out.…..or take it to a local independent diesel shop and have them run the test. I highly doubt that the problem with fuel pump.
 
Most of that is horsesh*t. Yes, you need the correct air filter.

However, the rest of that doesn't explain why so many are not getting the passive regen they normally did before their regen issues started.

In your case, your DPF is probably never getting clean and likely never will.
 
What year is the truck? It may still have warranty.
 
tangowhsky said:
It's a 2020 with 112k miles.
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Sucks your outside of you warranty. Did they actually test the psi from in the line? I am guessing how dealership are these days they did not and are blowing smoke up you. Ask them what psi they tested and what is normal. I would try new air filter and maybe clean your Map sensor.


Since your not in warranty I would find a local shop not owned by the dealer.
 
If your in-tank lift pump was lacking in supply pressure and / or volume, you would have issues starting and driving the truck, not just problems regenerating the DPF. A lack of sufficient supply would affect the HPFP, fuel rail, and injectors also. Are there any fuel related DTC’s showing up? Any drivability issues? Remember the engines injectors are what is used to dose fuel into the exhaust for regeneration.
 
I would check the EGR if its not staying closed when needed then you will have excessive soot loading
 
Its all in the airfilter. These trucks are so finicky that if I take the plug out of the side of my S&B I'll start soot loading and tossing P0402 code like the banks box. Put the plug back in and MPG climbs by about 1.5, soot loading stops, and so do the P0402 codes (did it as an experiment/comparison to the banks box). My truck is quite happy to run the S&B, Plug in, DRY filters, and a wrap - I get my wrapped filter for the butterfly mass casualty events (stock filters I'd be replacing the filter or picking butterflies out of the pleats with tweezers during butterfly season) and the truck runs right.
 
Well....here's my sign! :mad:

So, I can almost recollect putting in that Napa gold filter I talked about in the lead in the post above. But, upon packing the wife's car for a weekend road trip I find in the back of a garage junk shelf, still in the original box, that damn NG air filter...somebiatch folks, damn! So, hours before we left town, I ordered a mopar OEM air filter and just put it in 10 minutes ago. (the one that I just took out was a very dirty "STP" with china stamped on it)

So..... let's see what changes. I'll keep ya posted!
 
Dinky503 said:
Sucks your outside of you warranty. Did they actually test the psi from in the line? I am guessing how dealership are these days they did not and are blowing smoke up you. Ask them what psi they tested and what is normal. I would try new air filter and maybe clean your Map sensor.


Since your not in warranty I would find a local shop not owned by the dealer.
Click to expand...

I questioned the counter guy enough that he had to get a better description of how this is the "fix" from the tech who presumably did the test. They said we have the fuel sample and could show me all the contaminants then quoted the ~$2k solution...that's when I said I'll be in touch later. Unfortunately, I didn't think to ask what the PSI was vs. the acceptable range it's supposed to be.
 
tangowhsky said:
I questioned the counter guy enough that he had to get a better description of how this is the "fix" from the tech who presumably did the test. They said we have the fuel sample and could show me all the contaminants then quoted the ~$2k solution...that's when I said I'll be in touch later. Unfortunately, I didn't think to ask what the PSI was vs. the acceptable range it's supposed to be.
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Fuel contaminants would be caught by the filter so thats a load of crap……
 
H3LZSN1P3R said:
A scanner should be able to tell you EGR position but also just removing it and looking too see if the valve is closing all the way
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Agh, I remember now...I see I've taken this off and soaked it for hours in one of the cleaning solutions. So I believe it's probably fine.
 
With being out of warranty, putting the $$ towards a full delete would be the prudent solution to eliminate any of these regen issues.....just sayin...
 
I haven’t read the entire thread to find out if you found a solution. I just want to weigh in my opinion on their ‘solution’ sounds like they are trying to extort you out of 1900$:
Lift pump!!?? No way!! these engines don’t work like that.. the fuel pump delivers a larger amount of fuel than what the injectors need to begin with.. the rest gets returned to the tank. So there’s plenty of fuel at their disposal for a regen. If you were having lift pump issues you’d have trouble driving trough the RPM range.. I honestly get mad when i hear BS from service depts.. ok now I’ll go back and find out what happened lol
 
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