Jump to content

2020 3.0 Duramax - Code P2002

akawally
 Share

Recommended Posts

akawally Enthusiast

akawally

Posted
Posted

I bought my 2020 GMC AT4 back in early December.  I took delivery up in Montana so my first drive was a 750 mile trip home.  I have driven it very little since and it currently has about 1500 miles on it.  I noticed the CEL on the other day so I plugged my ODB scanner into to reveal a Code P2002 Diesel Particulate Filter Efficiency Below Threshold.  It was running fine, no other apparent symptoms.  Read more at: https://www.obd-codes.com/p2002

 

I took it into the dealer two days ago.  They called me later that afternoon and said that it was a new situation and that they were working with GM Engineers to determine a proper course of action but they would like to keep it overnight.  I wasn't surprised, in fact I expect that out of a new power plant and I have a daily driver.  Yesterday they let me know they were Fed-Exing an "exhaust pressure differential sensor" from Lansing.  They said the truck was OK to drive and that I could pick it up if I wanted.  I elected to wait until the repair was completed and hope to have it back today.  

 

I didn't see this code posted on the forum so I thought I would drop this information here for others to search.  I will provide another update when I get the truck back.  I will also ask what this would cost if it wasn't under warranty because I think that is useful information for evaluating the total cost of owning the LM2 diesel plant.  I did get an extended warranty but cost/risk and warranty coverage will be a inevitably be a huge factor in deciding how long to keep this particular rig.  I really really like driving it, more than the 6.2 and ALOT more than the 5.3.   I haven't towed with it yet but I hope to try that out this weekend.


WALLY

20200223_134401.jpg

Screenshot_20200223-170456.jpg

akawally Enthusiast

akawally

Posted
  • Author
Posted

Just got an update...  The sensor arrived but the technician won't have time to install it until tomorrow by EOD so I will have it for the weekend.  I asked them to check for recalls and they initially confirmed that it was all up to date, but today they said that two new updates were just released so they are going to get those done also.  I will find out more info on those when I pick it up.

 

On a side note, it seems like they have a HUGE number of T1's in for service right now, and the diesel specialists are especially highly constrained.  I think TSB's and recalls have the service department running hard.  Now I know where a good portion of my $61k is going.

 

WALLY

tlaw91 Enthusiast

tlaw91

Posted
Posted

I like your truck, nice color/option combo.

The new 3.0’s are fascinating, I can’t get over the mpgs and how quiet they are.


Sent from my iPhone using Tapatalk

akawally Enthusiast

akawally

Posted
  • Author
Posted
On 2/27/2020 at 4:38 PM, tlaw91 said:

I like your truck, nice color/option combo.

The new 3.0’s are fascinating, I can’t get over the mpgs and how quiet they are.


Sent from my iPhone using Tapatalk

Thanks!  I think its perfect :) 

 

UPDATE:  I picked up my truck yesterday, one of the DPF sensors was failing.   The cost to diagnose and replace would have been about $800 without the warranty.  I have had two of these fail on my 2016 Colorado (2.8 TD).   This indicates a potential for higher maintenance for a diesel over the long term unless some delete options emerge.  I got an extended (120k mile) warranty so I am not worried about it, but still just kinda interested in those costs overall.  I do love this truck.

 

They also applied the two latest updates that were released while it was in the shop - one was for the braking system and the other was for infotainment. 

Firetrout Enthusiast

Firetrout

Posted
Posted

Just had to drop mine off at dealership for Check Engine Light CODE P213A.  Waiting on a call back to let me know what issue is.  DIC showed 175 miles to reduced speed, service emission system.  Will keep yall updated.  

afterburner82 Enthusiast

afterburner82

Posted
Posted
On 2/29/2020 at 10:14 AM, akawally said:

Thanks!  I think its perfect :) 

 

UPDATE:  I picked up my truck yesterday, one of the DPF sensors was failing.   The cost to diagnose and replace would have been about $800 without the warranty.  I have had two of these fail on my 2016 Colorado (2.8 TD).   This indicates a potential for higher maintenance for a diesel over the long term unless some delete options emerge.  I got an extended (120k mile) warranty so I am not worried about it, but still just kinda interested in those costs overall.  I do love this truck.

 

They also applied the two latest updates that were released while it was in the shop - one was for the braking system and the other was for infotainment. 

Can you elaborate on the infotainment update at all?

akawally Enthusiast

akawally

Posted
  • Author
Posted
14 hours ago, afterburner82 said:

Can you elaborate on the infotainment update at all?

Yes!  Here is a photo of the service sheet which specifies updates.  I assumed that one was infotainment because when I picked up the truck it ejected the NAV SD card and then loaded an update before I drove it home.  Looking closer it seems like the two updates were for the brake system issue and a reductant control module update which is specific to the Diesel emissions stuff. 

 

WALLY

20200302_185159.jpg

Firetrout Enthusiast

Firetrout

Posted
Posted

They were able to clear the code and check engine light with the redundant control mod update..............hopefully that takes care of that problem.  

gone_fishing Enthusiast

gone_fishing

Posted
Posted
4 hours ago, Firetrout said:

They were able to clear the code and check engine light with the redundant control mod update..............hopefully that takes care of that problem.  

Thank you for the update. Hopefully this fixed your issues. Keep us posted with any other issues. I'm interested in this motor and will be in the market in the next year. BTW, what color is your Sierra and do you have any more pics? Don't think I have seen that color on the road.

 

Thanks!

  • 5 months later...
nickchodge New Member

nickchodge

Posted
Posted

I had this same problem with my 2020 AT4 3.0 diesel. Picked up in June. At 1900 miles the check engine light came on. Took it to dealer and they said the same thing: this is something new and they had to contact GM headquarters for info. I was told it was a diesel particulate sensor. They've had my truck 7 days. Am supposed to get it back today. I am in Spokane, WA. 

  • 4 weeks later...
SWBuckeye Enthusiast

SWBuckeye

Posted
Posted

Hi all.

 

I had the Brake Control Module and the ECM & Reducttant Control Module as well (3.765 miles). Then I have the exhaust back pressure valve go out and had to be replaced (code p2b97) (3,870 miles).  All has been good since, at 10,445 miles now. 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • twgraham
      Video processing module location

      By twgraham · Posted

      Can someone tell me where the video processing module is in a 2023 Silverado? I'm getting conflicting results that it's in the front passenger area or the rear passenger area behind the seat.
    • Chuck FB
      Missing thrust bearing? And oil selection

      By Chuck FB · Posted

      Yes I agree, its what amounts to free advertising to let people know about his UOA testing company, and not that there is anything wrong with that but certainly that is a motivator for putting out videos about the science of oil as well as other topics such as oil and air filtration etc. The interesting part I found with his last video is not only the physics behind the reason for the varying wear due to a diesels working torque range causing more bearing load and that higher viscosity oil is of benefit, it was also that the chemistry behind the GM Dexos 0W-20 and the Mobil Dexos licensed 0W-20 are far enough apart that its showing up with a difference in wear even though the two oils are matched in viscosity and in that comparison viscosity was not having the finger pointed at it.    There are a few youtubers out there or one anyway that I have watched a bit of who has gone through the pains of accessing various countries manuals for a certain engine platform and while in the US/Canada it may say use 0W-20 or what have you for some Toyota product, in some other countries it sings a very different tune for the very same engine with the typical traditional oil viscosity/ambient temperature charts to help choose which oil viscosity is correct for the conditions the vehicle will be used in and in some cases its taken an engine in a US manual that states only use 0W-20 as per warranty coverage and yet that same engine in certain other countries may have up to a 15W-40 etc oil option that meets the spec. Another words the guy who is driving through Death Valley or Phoenix and south weather at 120f is often being fed a line of bs by the US system that has forced vehicle companies to restrict the warranty to a specific low viscosity oil for anterior reasons as well as the long drain interval suggestions.    Thankfully youtube is free ( yet anyway ) for viewers to sift through information and of course comes with the good and the bad ( truth and lies ) and we can choose to turn off/not watch what a person finds is bs or just not interested in the topic.         
    • Atlas
      Missing thrust bearing? And oil selection

      By Atlas · Posted

      No doubt... But, as someone who doesn't pay for his services, but who has provided a few views/clicks on his Youtube platform, the data around the Mobil oil testing I think does have some value including to "freeloaders" like me.   A lot of what he's doing is likely showing the OE's work in their oil selection, something that many of us had kind of assumed was true all along, a good balance of both excellent protection and efficiency.
    • Z45
      Missing thrust bearing? And oil selection

      By Z45 · Posted

      Lake Speed is drumming up business for his company just by being in the spot-light so he has a vested interest in stoking the 0W-20 fire.  IMO  
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I knew when I bought my truck that it had off road hill decent or craw control or whatever they call it and rolled my eyes at that but it gets throw on with other options my truck has, I just never had a heads up if the highway speed regular cruise setting had anything to do with the brakes and that took me by surprise. If you've ever been to the top of Pikes Peak and watched those ahead of you on the way down with their brake lights on constantly, one can guess they are probably not gearing down or not enough anyway if their vehicle will allow and a good reason their is a brake check spot part way down where they use an infra red heat gun to check how hot ones brakes are front and rear.    Your right that once one gets out of the front range by Denver and I've not been on that stretch of 285 between Denver and Fairplay myself but I know its high and Fairplay at 10000 feet, Buena Vista at 8000, it drops a bit from there but then your going back up and over the 11000 pass and Durango is at 6500 . So yes your definitely right that 6500 and a lot higher is the theme of going anywhere out in that direction from Denver but hey, the down hill sections give fantastic fuel mileage !.    I don't even look at the fuel pumps for what premium costs here, since I live on a farm and up to this point get fuel delivered I am rarely in front of a fuel pump and when I am, I am often using card lock bulk fuel stations so it tells me what the price is AFTER I buy the fuel. Looking up on gas buddy and converting to US gallons but in Canadian dollars, regular on average of the prices listed was around 5.95 and premium is around 7.00 . That was one reason I did not go for the 6.2 half ton aside from its lack of carrying/towing if one was going by the rule of using premium fuel and until recently one could only buy regular farm gas if playing the few cents off game for farm dyed fuel for a "farm licensed pickup". But yes I hear you on the fuel price difference and like the diesel theme with it often being more expensive then gas it doesn't have quite the charm to it either as it once did although right now here for some reason the price of diesel has come down more so its now inline with the price of regular gas. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...