Jump to content

3.0 Duramax P1488 CEL code

Ogee1

By Ogee1
in Troubleshooting, Warranty & Recalls

 Share

Recommended Posts

Ogee1 Enthusiast

Ogee1

Posted
Posted

Hey everybody, I’m new to the forum and had a question. Has anybody had the P1488 engine on their new 3.0 Duramax? What was the dealerships fix? Thanks in advance for your responses. 

  • Replies 46
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Pinnacle
Pinnacle

Shut up with your crapota bullshit already and dont come on here saying no maker has this figured out dont speak on behalf of other makers you know nothing. Toyota has the best diesel around the world

1997SierraSLT
1997SierraSLT

Toyota is intelligent enough to not release unproven and unreliable garbage to market and allow their customer base to be guinea  pigs.     One would think companies such as Caterpillar, Det

yousaveone
yousaveone

People need to quit relating the other Duramax to ours. Their not even ALMOST the same. the big diesels are designed by Isuzu and the babies by FEV. While the codes are the same in some instances this

Ogee1 Enthusiast

Ogee1

Posted
  • Author
Posted

A little more info on this issue. I have been to the dealership for this issue about  2 weeks ago. They determined that the code was the result of a bad particulate filter pressure sensor. I had to wait for the part to come in. They replaced it on 2/7/20 and the CEL came on again on 2/9/20 for the same code, which was verified through On star. I’m waiting on a call back from dealer now. 

Thanks

Brent Judd New Member

Brent Judd

Posted
Posted

The codes tells me it is a 5 volt reading but could be anything from exhaust, starter electrical circuit, water in fuel, EGR, etc.. A long list of possible problems.  

Colossus Senior Enthusiast

Colossus

Posted
Posted

Welcome to the life of "modern" diesel emissions.  The nightmare all diesel manufacturers have to deal with.  I don't think there is one manufacturer that has this issue figured out. 
Ever wonder why Crapota doesn't want to bring diesel engines to their American vehicle line-up?  The DPF/DEF nightmare would ruin their reliability ratings. 

1997SierraSLT Enthusiast

1997SierraSLT

Posted
Posted (edited)
8 hours ago, Colossus said:

Welcome to the life of "modern" diesel emissions.  The nightmare all diesel manufacturers have to deal with.  I don't think there is one manufacturer that has this issue figured out. 
Ever wonder why Crapota doesn't want to bring diesel engines to their American vehicle line-up?  The DPF/DEF nightmare would ruin their reliability ratings. 

Toyota is intelligent enough to not release unproven and unreliable garbage to market and allow their customer base to be guinea  pigs.  

 

One would think companies such as Caterpillar, Detroit Diesel, Mercedes, and Isuzu have got it figured out since there are millions of these engines used in various vehicles on the road each day.

Edited by 1997SierraSLT
  • Like 1
Ogee1 Enthusiast

Ogee1

Posted
  • Author
Posted

I took my truck back to the dealership to look into the issue again. According to the service rep, they couldn’t figure out why it was displaying the code again. They contacted one of the engineers at GM, and he told them to do an ECM reset. Since doing the ECM reset, my truck hasn’t shown the code again. There has been about 300 miles put on my truck since. I’m keeping my fingers crossed. Hope you get your issue resolved and mine stays resolved. I’d be interested to hear what your dealership comes up with as far as resolving your P1488 CEL. 

  • 2 months later...
Ogee1 Enthusiast

Ogee1

Posted
  • Author
Posted

Hey Brent, I was wondering if the dealership ever figured out what your P1488 code was. My dealership has yet to figure mine out. I would appreciate your response if they did fix your new trucks problem.Thanks

  • 1 month later...
Caroquintero_156 New Member

Caroquintero_156

Posted
Posted

Having the same issue.  Bought the truck new in February 2020.  At 1600 miles CEL came on and Onstar diagnostics gave me error code P1488.  Took it to dealer and they did a manual regen and code cleared.  At 2000 miles CEL light again and same code.  They did another manual regen and said it was a participant matter sensor safety tube.  At 2700 miles CEL light again and same code.  Dealer did manual regen and flashed the computer.  At 3600 miles and CEL light and same code AGAIN!  Took it back to dealer and now they are saying it is the participant matter sensor that is bad, but...they don’t have any in stock and they can’t find anyone at GM that does, and the part is back ordered and they don’t know when it will be available.  ?????‍♂️

Ojustracing Enthusiast

Ojustracing

Posted
Posted

Was reading over the GM OEM repair information(I don't work for GM).  This particular code repair tree has what I call poor diagnostics.  You don't check wiring at all.  Basically if the code sets and there is no other codes.  Replace the  Exhaust Particulate Matter Sensor.  Hopefully GM will get to the bottom of it. 

Pinnacle Enthusiast

Pinnacle

Posted
Posted
On 2/18/2020 at 12:08 AM, Colossus said:

Welcome to the life of "modern" diesel emissions.  The nightmare all diesel manufacturers have to deal with.  I don't think there is one manufacturer that has this issue figured out. 
Ever wonder why Crapota doesn't want to bring diesel engines to their American vehicle line-up?  The DPF/DEF nightmare would ruin their reliability ratings. 

Shut up with your crapota bullshit already and dont come on here saying no maker has this figured out dont speak on behalf of other makers you know nothing. Toyota has the best diesel around the world period.

  • Like 3
  • 2 weeks later...
swervin36 Enthusiast

swervin36

Posted
Posted

Just had my check engine light come on again.  OnStar diag came back with the same code P1488.  The truck has already been back to the dealer for this about 500 miles ago.  They said that there was a firmware update that they installed and it should fix the issue.  Well I guess it didn't.  I have an appointment in the morning to get the truck looked at.

RockyBlue Enthusiast

RockyBlue

Posted
Posted

I have been dealing with this issue as well.  Been to the dealer 3 times since purchasing my 2020 Duramax I6.  Parts are hard to come by so I will wait for my second sensor replacement.  Had the software update as well.  This issue is certainly temperamental.  It comes and goes without any reason that I can tell.  I see that there are mostly people on this forum from altitude.  Maybe this has something to do with it?

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

    • C/K Man
      Silverado 4500-5500-6500 are they still being produced? Would have sold better as GMCs as well

      By C/K Man · Posted

      There was talk over the last couple of years that the contract to build these trucks between GM and International would not be renewed.  International moved production of all their other trucks besides the companion CV model out of the Springfield plant some time ago when they opened their San Antonio plant.  That left Springfield only building the Silverado Medium Duty, International CV Series, and some Express/Savanna long wheelbase cutaways.  International also put the plant up for sale some time ago.  This all answered my earlier question as to why GM and International did nothing with these trucks since they were introduced, as they had basically become a market 'placeholder' with a finite life.    The Silverado Medium Duty/International CV trucks were interesting combination of a GM powertrain, electrical system, and K2XX Silverado cab with an International chassis that was supposedly designed for a step-van type vehicle they never produced.  They were manufactured in International's Springfield plant along with the IH MV series initially.  When first introduced, there was much talk that the Silverado Medium Duty/CV would eventually get a gasoline engine option along with other upgrades and GM and IH would work on a class 6/7 joint venture truck.  This was before VW bought Navistar out, after that happened no more was said.  Draw your own conclusions...   About the time talk started that the GM/IH joint venture was not going to be renewed, rumors started that GM would develop a new line of medium duty trucks themselves.  The story is the new trucks will be part of the next generation HD's due in 2028, and will still feature a 'straight rail' chassis design that the current medium duty has.  GM views this as a desirable feature that differentiates their truck from the competition.  A gasoline engine option is also expected.  As the current Silverado Medium Duty remains in production until September 2026 and there is still a lot of inventory available do not expect any official word for some time.   I believe GM remains committed to their successful partnership with Isuzu, and all the LCF models will still be available from Chevy Commercial dealers.  Isuzu is on the cusp of opening a new large plant in South Carolina and there is also speculation that this may result in new product for both Isuzu and Chevy Commercial dealers.                  
    • davester
      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.
    • davester
      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.
    • nfisherman
      Software Update

      By nfisherman · Posted

      I have a 2026 2500 HD Ultimate. My phone app says there’s a software update available. It’s something about improved battery management and something to do with the running boards. I follow the instructions for the update but the “Check for Updates” option is greyed out in my settings menu. Has anyone else seen this? How did you resolve it? The help message just says “see your dealer” if the download doesn’t work. I’m just trying to save a trip. 
    • newdude
      Exhaust Question

      By newdude · Posted

      Fuel mileage?  That's all how you use your right foot.  Exhaust will give you sound.   Stock exhaust 5.3 is 2.75" diameter piping.     If the truck is nice and worth putting some $$ into it, I'd go for a Corsa catback.  I had one on my 2019 old body 5.3 and it was just perfect.  Zero drone, just driving around and cruising on the highway you'd think it was stock, but when you opened it up it was like a Camaro with the factory dual mode.  Corsa bumps their catback to 3in diameter.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...