Diesel Engine Incorrect Calibration? N212355140

[badreau]

Hey all,
The wife has her 2022 Tahoe booked in for the 2nd complimentary oil change tomorrow at our local dealer.
She just mentioned the dealer advised that there was a recall in place for “Diesel Engine Incorrect Calibration”, and that it would be recalibrated. Not sure what that entails, I plan to call in the morning when they open but figured I’d ask if anyone else has heard of this.

The GM Owner Center lists no recalls for the vehicle, and we just had it at the dealer 2 or 3 weeks ago to have the dash software updated and this wasn’t brought up so seems like a new thing.

On another note - are you all forking out for “multi-point inspections” on top of the free oil/filter service? Dealer wants $90 for it here in Canada.

 

[Holy Roller]

Suspect the calibration is related to the daytime running light interaction with the turn signals.

As for $90 for bogus inspection, well, you live in Alberta.

 

[badreau]

Suspect the calibration is related to the daytime running light interaction with the turn signals.

As for $90 for bogus inspection, well, you live in Alberta.

Checked the service paperwork from when we had the dash software update done, they took care of the DRL recall at that time as well. So must be something else. I'll report back once I speak with the dealer.
As for the inspection, roger that.

 

[StephenPT]

Very likely this is the update to fix the crank no-start condition on some LM2s.

 

[badreau]

Well the dealer wasn't much help. Even the service manager couldn't explain the scope of the fix, just that it was to reprogram the ECM - "we're updating the software" was the depth of her knowledge.
I was able to get a copy of the "Service Update" as it is called - N212355140, see attached. It is brand new, released Jan 23rd.

Got conflicting info at the dealership and from Chevrolet Customer service, as to whether it is a Technical Service Bulletin (TSB) or a Recall. Either way, can't find any info online related to it yet.
As this point I declined the work until they can explain what the issue with the calibration is and how the fix will impact the vehicles operation. I don't want to be a guinea pig for this brand new fix.

Let me know if anyone else gets some info on this.

 

[B-train]

It wouldn't surprise me if it was a revised fuel calibration for "better emissions." But, I could be wrong. I would hold out to see what it actually is supposed to correct. Think VW and their whole remapping that made the cars get worse fuel economy.

Anytime the govt gets involved to appease environmentalists that have no clue about engine efficiency, you will pay more to drive.

 

[badreau]

It wouldn't surprise me if it was a revised fuel calibration for "better emissions." But, I could be wrong. I would hold out to see what it actually is supposed to correct. Think VW and their whole remapping that made the cars get worse fuel economy.

Anytime the govt gets involved to appease environmentalists that have no clue about engine efficiency, you will pay more to drive.

100%. I specifically cited this as a reason why I wanted more info. I said for all I know this will change fuel economy. Right now the vehicle is working great. Not going to fix what isn't broke unless I know more.

 

[DuraYuk]

Looks pretty cut and dry to me. 21 and 22 certain vehicles affected. Wrong ecm calibration. Crazy that your so apprehensive over something they are trying to fix/get ahead of.

To each their own i suppose.

 

[FatBob]

The Service Update did not list any trucks. Maybe they get a different calibration than SUVs?

 

[2022yukondiesel]

Looks pretty cut and dry to me. 21 and 22 certain vehicles affected. Wrong ecm calibration. Crazy that your so apprehensive over something they are trying to fix/get ahead of.

To each their own i suppose.

Checked the service paperwork from when we had the dash software update done, they took care of the DRL recall at that time as well. So must be something else. I'll report back once I speak with the dealer.
As for the inspection, roger that.

Same scenario here. 2022 Yukon Diesel in yesterday for the DRL recall and came back as also having addressed the Diesel Engine Incorrect Calibration. Would be nice to understand it more, so I get why you are curious.

 

[Zkeegan4]

So I had the N212355140 recall done on my 22 Chevy suburban w/ 3.0 and all I can say is DONT DO IT. My low end torque is gone now and my fuel economy went to shit. I’m trying to get the old software back

 

[badreau]

So I had the N212355140 recall done on my 22 Chevy suburban w/ 3.0 and all I can say is DONT DO IT. My low end torque is gone now and my fuel economy went to shit. I’m trying to get the old software back

Sorry to hear that man! Let me know how you fair with the software roll-back.
Any info on fuel economy prior to and after the recall? I.e. averaged X before and now it’s Y.

 

[B-train]

And there you have it......

The EPA should focus on real problems. What a bunch of incompetent, uneducated, ************, butt sniffing idiots.

 

[B-train]

Apparently ba ll lick ing is too insensitive for the sensors. Is this MSN now?

 

[DuraYuk]

So I had the N212355140 recall done on my 22 Chevy suburban w/ 3.0 and all I can say is DONT DO IT. My low end torque is gone now and my fuel economy went to shit. I’m trying to get the old software back

I don't know that I buy that. Need more details. What was the mpg before and after ? What do you mean less torque? You dynoed it before and after ? Or you just 'feel' it less?

Tsb only covers 21 and 22s so i guess us 23 owners got lucky with our great mpg/tq haha. Smh.

Before making giant statements like that some more info and specifics would be nice especially from someone with 1 post lol.

 

[B-train]

It happens more than you think. The spotlight is on diesel now because of the EPA and their ludicrous regulations. Big GOVT and big OIL don't want you having too much ability to drive freely and cheaply. The old bait and switch technique now that these have caught on, people like them, AND they get good fuel economy. CAFE requirements are ever changing based on the number of vehicles sold.

 

[DuraYuk]

It happens more than you think. The spotlight is on diesel now because of the EPA and their ludicrous regulations. Big GOVT and big OIL don't want you having too much ability to drive freely and cheaply. The old bait and switch technique now that these have caught on, people like them, AND they get good fuel economy. CAFE requirements are ever changing based on the number of vehicles sold.

Um...........lol nvm.

Hopefully the dude can post some specifics and not just sensationalism.

And the reason i call BS is that the tsb reprograms 21 and 22s. So 23s are good to go. If you believe in your conspiracy theory or the guy that just posted with no post history that's fine. But my 23 and countless others are still getting great MPG and our machines have the latest programming. Mine also has immense low end torque. So yeah something is 'fishy'! Lol but I guess conspiracy theories and false logic is more fun so keep at it!

 

[B-train]

Um...........lol nvm.

Hopefully the dude can post some specifics and not just sensationalism.

And the reason i call BS is that the tsb reprograms 21 and 22s. So 23s are good to go. If you believe in your conspiracy theory or the guy that just posted with no post history that's fine. But my 23 and countless others are still getting great MPG and our machines have the latest programming. Mine also has immense low end torque. So yeah something is 'fishy'! Lol but I guess conspiracy theories and false logic is more fun so keep at it!

So, let's have a tutorial about emissions.....

1. GOVT isn't your friend
2. Corporations are after the bottom dollar, not your bottom dollar
3. #1&2 are in bed together. Corps being the little spoon
4. CAFE - corporate average fuel economy

Emissions are not your friend first off, driven by #1. There are different tiers and bins in said tiers. Based on HP ratings, displacement, GVW, and others determines what "bin" in the tier it has to achieve. At times there are "interim" calibrations that are allowed until finalized rules/regs are established.

After that is determined, a calibration is made to achieve said rating. CAFE is based on total vehicle sales and has to meet the standard. No auto maker knows what their number will be at the beginning of a year. They can project a number and base CAFE off historical data. NO automaker wants to give up CAFE credits for any reason if they don't have to. It's like their warm, fuzzy blanket for a rainy day.......so they keep them close.

This means that if they all of a sudden start selling the shit out of big vehicles and less little ones, their CAFE numbers will be off for that year. So, in order to satisfy their bed partner (govt/big oil), they would have to give up some of their precious CREDITS.......or they can do the govt/corporate thing and pass it along to the end user. Hence "revised" calibrations that allow them to satisfy their bin requirements for their CAFE requirements after the fact.

Lastly, emissions are driven by uneducated, corrupt govt peoples who have pockets lines by oil companies. In the guise of cleaner air, they will sell you something that uses more fuel to do the same amount of work. And for you diesel owners, they also get to sell you DEF which is a byproduct they didn’t have a huge market for before tier 4.

Follow the money, use common sense and you'll see the real story. If you think 26 - 30 mpg is good, you wouldn't believe what you could get with a motor calibrated for EFFICIENCY, not what the EPA says is clean.........2 VERY different things.

I hope this is less sensationalism. I can get out the crayons if needed.......

 

[Zkeegan4]

Y’all don’t have to believe me…
1. I reset my tripometer every fill up and check the average mpg. Before the recall I was at 21mpg now 18mpg. Most of my torque was at 1700-2400rpm…now it is much higher. I made an account to warn y’all not be a troll.

 

[Stbentoak]

Mine has been to the dealers multiple times for various reasons, including in the last month. Nothing has been reprogrammed and it runs great as it always has. Never heard of this "recalibration"