[desautelsd]

Anyone have any experience with recent TSB #19-NA-124 which was released June 10, 2019 to address a "Software Anomaly" that may cause DTC's associated with the Particulate Matter Sensor, specifically P1476, P1478, P24B0, P24B1, etc. Looks like it may be the latest attempt by GM to resolve the issue. Not sure how that actions differ from the recall associated with the faulty DTC's for Particulate Matter Sensor.
Unfortunately I didn't know about it until the GM Engineer pulled it out at the Arbitration Hearing to claim the ongoing issues with DPF have been "corrected".

 

[Chopped Liver]

So I have had the update twice and the code clear 4x times in the last 60x days. Check engine just popped again. How did you initiate your arbitration?

 

[desautelsd]

Each state has its own laws and process for vehicle arbitration. NH is very consumer focused, other states not so much. Start by searching "Lemon Law" or "Vehicle Arbitration" through your state's motor vehicle website. New Hampshire's is https://www.nh.gov/safety/divisions/dmv/title/lemon-law/index.htm
There is typically a standard form and filing fee that must be mailed to the state, along with any copies of documentation you wish to submit as "evidence." A copy of all documentation must also be provided to the manufacture's representative, in my case a lawyer from NY.
I have some more pointers if you decide to move forward with arbitration. I was offered a settlement, but declined. My arbitration was not successful because the check engine light was not on when the hearing officer inspected it, even thoght the "fix" had been proven not to work. No CEL = No issue. Good luck!

 

[Shaun Harrison]

So I have had the update twice and the code clear 4x times in the last 60x days. Check engine just popped again. How did you initiate your arbitration?

Each state has its own laws and process for vehicle arbitration. NH is very consumer focused, other states not so much. Start by searching "Lemon Law" or "Vehicle Arbitration" through your state's motor vehicle website. New Hampshire's is https://www.nh.gov/safety/divisions/dmv/title/lemon-law/index.htm
There is typically a standard form and filing fee that must be mailed to the state, along with any copies of documentation you wish to submit as "evidence." A copy of all documentation must also be provided to the manufacture's representative, in my case a lawyer from NY.
I have some more pointers if you decide to move forward with arbitration. I was offered a settlement, but declined. My arbitration was not successful because the check engine light was not on when the hearing officer inspected it, even thoght the "fix" had been proven not to work. No CEL = No issue. Good luck!

 

[turbodiverart]

Hey all. I have a 2017 Colorado 2.8, I bought it certified used in 2019 with 16K on it. I drove it for about 4000 miles with no trouble. I had the ECU flashed as part of the recall a few months and maybe 2000 miles ago. Last night when driving home (local driving) truck threw a P1476 CEL. Truck continued to run fine with no issues. I haven’t cleared it and on restart the CEL is still there. The truck is still under the certified used extended warrantee for another 2 months. It seemed the latest ECU flash was supposed to address this issue? I assume I should bring it in for this code as maybe it’s not a software abnormality but maybe a true faulty sensor?

 

[turbodiverart]

Hi All,

My truck just ran out of the certified used extended warranty yesterday and popped a P1478 code. I cleared it this morning before going on a short drive to the post office, CEL light came back on. I have the most current software flash. I still have one free oil change to do with the dealer and I'm about due so I'll bring it in. Not sure what they are going to say about the code. Kind of pissed with the timing. Lately I have been doing a good mix of local and highway driving and been having good regens about every 300 miles and most all have been performed on the highway. Wondering if maybe the particulate sensor is actually bad.

Thoughts?

 

[Coloradorob]

Hi All,

My truck just ran out of the certified used extended warranty yesterday and popped a P1478 code. I cleared it this morning before going on a short drive to the post office, CEL light came back on. I have the most current software flash. I still have one free oil change to do with the dealer and I'm about due so I'll bring it in. Not sure what they are going to say about the code. Kind of pissed with the timing. Lately I have been doing a good mix of local and highway driving and been having good regens about every 300 miles and most all have been performed on the highway. Wondering if maybe the particulate sensor is actually bad.

Thoughts?

I bet you do have a bad sensor.
twice now my truck came up with the keep driving cleaning DPF. I do a lot of highway driving and usually it just does a normal regen. I monitor the the soot load in the dpf constantly and it should have just did a normal regen .
Not sure why it came up with the cleaning msg. Wasn’t stuck in traffic or running short trips.
All the after treatment BS they have on diesels now days is crap. It is unreliable at best.

 

[turbodiverart]

I bet you do have a bad sensor.
twice now my truck came up with the keep driving cleaning DPF. I do a lot of highway driving and usually it just does a normal regen. I monitor the the soot load in the dpf constantly and it should have just did a normal regen .
Not sure why it came up with the cleaning msg. Wasn’t stuck in traffic or running short trips.
All the after treatment BS they have on diesels now days is crap. It is unreliable at best.

Well luckily they are replacing it under warranty. The dealer could not get the sensor out. He said he's replaced tons of these, says it's a design flaw he believes in the sensor. The nut just can't take the 1200 degrees from the regens and eggs and locks in place. He said he always has to use heat to get it out. With mine the nut broke in half, not rounded, literally broke in half. 3 of the 6 nut flats on are on the sensor, the other 3 were in his hand. The GM warranty calls for a tailpipe replacement. I think I'll end up getting a new DPF with the deal as it's all one big welded piece up to the back of the SRC. They ordered a new tailpipe but it was too big to it in the delivery van so it's being trucked in. Kind of crazy if they are in fact replacing the DPF with the tailpipe as I'm sure this warranty work is costing GM like $8k to replace a $125 poorly designed sensor. The mechanic says he seems to replace these things about every 4 years. When I get the truck back I'm going to loosen the sensor and make sure it's not the specified35 lb/ft of torque, should help it to come out in another few years when it needs to be replaced again. Service guy said he would not be surprised if GM does some kind of recall on the sensor because they replace so many. Since I'm at the last day of my factory warranty, I'm not sure if this is being covered under GM warranty or federal emissions warranty. Just nuts!