L5p P20EE

UnclePhil

New member
Sep 30, 2017
7
0
1
Sad times around my house. Second time taking my 2018 2500hd in for a CEL at only 600 miles. It has the dreaded P20EE code. So far they have :
Done a regen
Drained and refilled the Def and then regen
Replaced NOX sensor
Ordered a gasket for something

No fix yet!


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02greysixer

Active member
Jun 4, 2011
1,829
7
38
North Central FL
Lml' s often require a successful drive cycle before the code will clear or lights will go off after replacing a NOx. Do you know if they've taken it for a long ride yet?

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kiwilml

Member
Nov 4, 2015
454
0
16
I'm just happy that my L5p has never had a CEL come on.. I would be very tempted to sell it for a tuneable truck lol.. Good luck man
 

UnclePhil

New member
Sep 30, 2017
7
0
1
It came on at 250 miles. And again after driving about 200 miles they ordered a reduction fluid gasket today. Think they are just going to get me in a different truck. This has me all kinds of sideways.


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SmokeShow

Well-known member
Nov 30, 2006
6,803
25
48
40
Lawrenceburg, KY
... This has me all kinds of sideways.


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TOTALLY understood considering the cost of one of those trucks! I'd be absolutely sick and 100% second guessing my sanity for spending that kind of coin on a truck just to have it kicking out CELs like its NBD!! :(:eek::mad:
 

UnclePhil

New member
Sep 30, 2017
7
0
1
Update:
Dealer put me in a new truck! And it thru the same code at 194 miles! Now back in the original truck hoping the gasket fixed it. Chevy says even they don’t know how to fix.


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IOWA LLY

Yes, its really me
Feb 23, 2007
2,275
4
0
Wow. I just love how the EPA and the government have ruined absolutely EVERYTHING!


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Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
18,134
399
83
Phoenix Az
It’s a first year truck and I’ll bet money gm pushed some things through faster than they should have. Gunna be another 1-2 years before they figure it out I’ll bet. Knowing what I know from my engineer buddy, you understand a lot of why some of this crap comes up lol
 

beach_33

Member
Feb 18, 2008
704
0
16
des moines, IA
It’s a first year truck and I’ll bet money gm pushed some things through faster than they should have. Gunna be another 1-2 years before they figure it out I’ll bet. Knowing what I know from my engineer buddy, you understand a lot of why some of this crap comes up lol
This was my thinking in buying a 16 instead of waiting a few weeks and buying a 17. I felt confident buying the last year of an engine code because they would have all the bugs worked out. Except they didn’t!!! I’ve had emissions problems with mine in Under a year of ownership. So yeah.....
 

zakkb787

<that’s not me...
Sep 29, 2014
2,322
46
48
Granite Falls NC
Doesn't matter what you buy. Bugs are always gonna be there. Granted the first year or two is generally always a bad idea but nothing is made perfect anymore lol
 

henery97

Member
Apr 4, 2011
206
0
16
Nebraska
I had the P20EE code twice in the first 1200 miles, then a pretty healthy coolant leak from the hose between the egr cooler & turbo. All within the first 1500 miles. I told my dealer I was done with this POS & wanted a 15 or 16 & they told me to go pound sand. Needless to say this is the last new duramax I will ever own:mad:
 

kiwilml

Member
Nov 4, 2015
454
0
16
Me and my brother both have over 40k miles with zero problems.. I really don't think they have any more problems than previous models..

I think it's just everybody is so sensitive since it's a 'new model' that EVERY issue gets talked about and so it seems like they have a few more problems.. Lots and lots of the trucks on the road with no problems I'm sure.. Jmo

Least don't have to worry about the cp4 lol
 

Hambone

Always learning
Jan 24, 2016
571
0
16
Florida
We have 4 now in the fleet and so far only problem was the 3500 SCLB had a blown fuse from guys at dealer installing the trailer plug in bed
Mines at 13k
The tow pig is at 8k
The flatbed is at 9k
Mexican mafias truck is at 5k
The tow truck puts an average 45-55k a year on so he will be the true test
 

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