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Help figuring out p0420
09-20-2017, 05:59 PM
Post: #1
Help figuring out p0420
2014 D13H with approximately 982000 kms
Hey hey good people of mhhauto..
Just got the p042000 code, which is related to SCR efficiency or such, the trucks after treatment is unmodified, and was wondering is it a bad sensor, or could be related to the def collection on the exhaust pipe btwn DPF and SCR (which I recently discovered, picture attached).
Could it be that the pipe got a leak and is sucking air in and throwing the code?
Or is something else, sensor, SCR on the way out (hope not).
Just need someone else's opinion/2¢ on this if someone came across the problem.
I should mention that a week ago dealer put in a new emissions update(which was supposed to cure most of these problems), so much for that. [Image: b2866a6f11eb29ced6214f5ae70af97c.jpg][Image: 78cadfc3d74ce5a083b34c0378c986c1.jpg]

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09-20-2017, 06:15 PM (This post was last modified: 09-20-2017 06:39 PM by Egrdpfremover.)
Post: #2
RE: Help figuring out p0420
(09-20-2017 05:59 PM)badassteddy Wrote:  2014 D13H with approximately 982000 kms
Hey hey good people of mhhauto..
Just got the p042000 code, which is related to SCR efficiency or such, the trucks after treatment is unmodified, and was wondering is it a bad sensor, or could be related to the def collection on the exhaust pipe btwn DPF and SCR (which I recently discovered, picture attached).
Could it be that the pipe got a leak and is sucking air in and throwing the code?
Or is something else, sensor, SCR on the way out (hope not).
Just need someone else's opinion/2¢ on this if someone came across the problem.
I should mention that a week ago dealer put in a new emissions update(which was supposed to cure most of these problems), so much for that. [Image: b2866a6f11eb29ced6214f5ae70af97c.jpg][Image: 78cadfc3d74ce5a083b34c0378c986c1.jpg]

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hello

I can help you remove the SCR completely from the calculator


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09-20-2017, 06:21 PM
Post: #3
RE: Help figuring out p0420
Thanks mate
But that is the option I'll save for last resort.
Untill now the system behaved flawlessly, so not gonna go and nuter it right away if there ia a simple mechanical fix( plus the truck seems to run ok, plenty of power and such).
Not even sure which file I would post, not that good with tech tool Sad.

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09-20-2017, 06:29 PM (This post was last modified: 09-20-2017 06:37 PM by Egrdpfremover.)
Post: #4
RE: Help figuring out p0420
(09-20-2017 06:21 PM)badassteddy Wrote:  Thanks mate
But that is the option I'll save for last resort.
Untill now the system behaved flawlessly, so not gonna go and nuter it right away if there ia a simple mechanical fix( plus the truck seems to run ok, plenty of power and such).
Not even sure which file I would post, not that good with tech tool Sad.

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The P0420 error code is a sign that your catalytic converter is under performing. That could mean it needs to be replaced or just possibly cleaned.



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09-20-2017, 06:54 PM (This post was last modified: 09-20-2017 06:55 PM by badassteddy.)
Post: #5
RE: Help figuring out p0420
By cleaned do you mean run a forced Regen, or crystal sublimation cycle, or manually take it off and beat the shit out of it w 2x4 Smile(I like the last one but never gets me the results I want)
Also could a bad NOx sensor mess w the readings?
Running Rockies right now, means limited cell coverage, also means that I'll get the system nice and hot, maybe it does one of those passive regens and the code clears and I don't have to do squat (guy can hope) Smile

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