Check Engine Light after using launch control
Thread Starter
1st Gear
Joined: Nov 2021
Posts: 1
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Check Engine Light after using launch control
Wondering if anyone has experienced anything similar.
I have a 2022 Z51 with 750 miles on the odometer. Today was my first attempt at using launch control. When shifting into 2nd gear, it seemed to slip and then lose power. Solid check engine light after that. Brought it to the dealer and the code stated that the engine torque didn’t match what the computer expected it to when in second gear. I had some decent tire spin off the line due to cold temps in NY (44F). We cleared the code and upon a second launch attempt, had the same result.
The car drives completely normal (unless I try to use launch control) but I’m dropping the car off for a more thorough check on Monday.
Might have a new transmission in my future, or a new Z51, or a new Z06?!?
I have a 2022 Z51 with 750 miles on the odometer. Today was my first attempt at using launch control. When shifting into 2nd gear, it seemed to slip and then lose power. Solid check engine light after that. Brought it to the dealer and the code stated that the engine torque didn’t match what the computer expected it to when in second gear. I had some decent tire spin off the line due to cold temps in NY (44F). We cleared the code and upon a second launch attempt, had the same result.
The car drives completely normal (unless I try to use launch control) but I’m dropping the car off for a more thorough check on Monday.
Might have a new transmission in my future, or a new Z51, or a new Z06?!?
Popular Reply
Nov 4, 2021, 09:04 PM
Melting Slicks
Joined: Aug 2018
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I thought the use of launch control or any competitive driving should be done after the 1500 mile break in period.
Burning Brakes
Joined: Jan 2021
Posts: 849
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From: Kearney, NE
I will be waiting until I have 1500 miles on the clock before I do launch control, GM recommended break in period for the DCT.
Just don't want to mess anything up since the DCT is not 100% sorted yet.
Just don't want to mess anything up since the DCT is not 100% sorted yet.
Melting Slicks
Joined: May 2021
Posts: 2,562
Likes: 1,579
Really? You don't think "slipping" while going into 2nd gear sounds like a potential transmission / clutch type issue?
Unless the slipping is really just the ECU shutting down because of the torque sensing issue. Could still be a sensor type issue in the tranny. How does this T9080 detect "torque" anyway?
Is it solely based on a hall effect or some other sensor that senses the rotational speed of the output shaft over time? (knowing the approx. weight of the car, wheel dims, should be able to derive the tq). What if there is wheel spin though, accelerometer?
Unless the slipping is really just the ECU shutting down because of the torque sensing issue. Could still be a sensor type issue in the tranny. How does this T9080 detect "torque" anyway?
Is it solely based on a hall effect or some other sensor that senses the rotational speed of the output shaft over time? (knowing the approx. weight of the car, wheel dims, should be able to derive the tq). What if there is wheel spin though, accelerometer?
Drifting
Joined: Dec 2019
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Race Director
Joined: Aug 2019
Posts: 12,351
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From: Central Illinois
Really? You don't think "slipping" while going into 2nd gear sounds like a potential transmission / clutch type issue?
Unless the slipping is really just the ECU shutting down because of the torque sensing issue. Could still be a sensor type issue in the tranny. How does this T9080 detect "torque" anyway?
Is it solely based on a hall effect or some other sensor that senses the rotational speed of the output shaft over time? (knowing the approx. weight of the car, wheel dims, should be able to derive the tq). What if there is wheel spin though, accelerometer?
Unless the slipping is really just the ECU shutting down because of the torque sensing issue. Could still be a sensor type issue in the tranny. How does this T9080 detect "torque" anyway?
Is it solely based on a hall effect or some other sensor that senses the rotational speed of the output shaft over time? (knowing the approx. weight of the car, wheel dims, should be able to derive the tq). What if there is wheel spin though, accelerometer?
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Le Mans Master
Joined: Apr 2005
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From: West Burbs of Chicago IL
Wondering if anyone has experienced anything similar.
I have a 2022 Z51 with 750 miles on the odometer. Today was my first attempt at using launch control. When shifting into 2nd gear, it seemed to slip and then lose power. Solid check engine light after that. Brought it to the dealer and the code stated that the engine torque didn’t match what the computer expected it to when in second gear. I had some decent tire spin off the line due to cold temps in NY (44F). We cleared the code and upon a second launch attempt, had the same result.
The car drives completely normal (unless I try to use launch control) but I’m dropping the car off for a more thorough check on Monday.
Might have a new transmission in my future, or a new Z51, or a new Z06?!?
I have a 2022 Z51 with 750 miles on the odometer. Today was my first attempt at using launch control. When shifting into 2nd gear, it seemed to slip and then lose power. Solid check engine light after that. Brought it to the dealer and the code stated that the engine torque didn’t match what the computer expected it to when in second gear. I had some decent tire spin off the line due to cold temps in NY (44F). We cleared the code and upon a second launch attempt, had the same result.
The car drives completely normal (unless I try to use launch control) but I’m dropping the car off for a more thorough check on Monday.
Might have a new transmission in my future, or a new Z51, or a new Z06?!?
I too have a 2022 Z51 with almost exactly 750 miles on it and I’m not dropping 0-60 launches in 44F temps like a noob (when the manual says maybe not a good idea under 1500 miles).
Race Director
Joined: Aug 2019
Posts: 12,351
Likes: 14,183
From: Central Illinois
When I was at Ron Fellows they had us practice using launch control. After a couple passes the instructor offered to let us manually shift it. I hit the paddle before the red line in first, but maybe it was too close, it was like I shut the car off. I just about bounced my head off the steering wheel. Letting the DCT do it's own thing is the answer, but if a bunch of wheel spin is detected all kinds of things can happen. Maybe the DCT has a problem, but maybe it doesn't too.
Le Mans Master
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From: Rural NW Georgia. GO DAWGS!
2024 C8 of the Year Finalist - Unmodified
Racer
Joined: Apr 2021
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From: Savannah, Georgia
I agree and I'm not trying launch control until after 1500 miles.
The manual also adds the "similar activities" language to those instructions. That's lawyer speak for dealers to use so that if they know you've been driving the car too hard they can deny warranty work. I'm not risking that.
The manual also adds the "similar activities" language to those instructions. That's lawyer speak for dealers to use so that if they know you've been driving the car too hard they can deny warranty work. I'm not risking that.
Race Director
Joined: Sep 2016
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How long did you wait to get this car? Everyone else is being very polite… but you’re lucky you didn’t put it sideways into a curb like a Mustang leaving chrome and coffee.
I too have a 2022 Z51 with almost exactly 750 miles on it and I’m not dropping 0-60 launches in 44F temps like a noob (when the manual says maybe not a good idea under 1500 miles).
I too have a 2022 Z51 with almost exactly 750 miles on it and I’m not dropping 0-60 launches in 44F temps like a noob (when the manual says maybe not a good idea under 1500 miles).
That said, at 44F the summer tires on the Z51 are definitely giving up some traction if they're not good and hot from driving.
Last edited by Red Mist Rulz; Nov 5, 2021 at 03:08 PM.
Advanced
Joined: Nov 2021
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I'm considering purchasing a C8 as my first corvette (I've been a life-long Corvette admirer) . However there seem to be a fair amount of transmission related issues with the C8 (please correct me if I'm wrong). GM put all its chips on the DCT (by getting rid of the MT.) I really hope they get these issues sorted with the current DCT.
Race Director
Joined: Sep 2016
Posts: 13,180
Likes: 10,522
I'm considering purchasing a C8 as my first corvette (I've been a life-long Corvette admirer) . However there seem to be a fair amount of transmission related issues with the C8 (please correct me if I'm wrong). GM put all its chips on the DCT (by getting rid of the MT.) I really hope they get these issues sorted with the current DCT.
No one outside GM and Tremec really know what the problem and failure rates are. But anecdotally the rates seem to be higher than we, and GM, would like. At the same time, I don't think the issues are nearly as common as reading the forums might lead you to believe. Few people join a forum to say "Hey, my car's running great, and my DCT is flawless." But a great many people who have a problem join forums to either ask for help or complain. Or both. So any issues, DCT and other, tend to get magnified on the forums, Facebook, etc. There are some 50 to 60,000 C8s on the road. If problems with the DCT were really common there'd be no room on the forums for anything but DCT threads, and the Facebook C8 pages would be filled with almost nothing else.
The good news is that where problems do occur GM is taking care of them without any hassle beyond the wait for parts.
Le Mans Master
Joined: Sep 2017
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From: Rural NW Georgia. GO DAWGS!
2024 C8 of the Year Finalist - Unmodified
It doesn't say that. It states that the car should not be tracked or "similar activities" before 1500 miles. As I posted earlier today that language is in there so a dealer could potentially deny warranty coverage if they determine you have been driving the car too hard before the DCT has time to break-in properly.
Race Director
Joined: Aug 2019
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From: Central Illinois
It doesn't say that. It states that the car should not be tracked or "similar activities" before 1500 miles. As I posted earlier today that language is in there so a dealer could potentially deny warranty coverage if they determine you have been driving the car too hard before the DCT has time to break-in properly.
So the questions are these:
Is a launch control start a full throttle start? Answer: Yes
Did the car have over 500 miles when this full throttle start occurred? Answer: Yes
Does the manual state no full throttle starts below 500 miles? Answer: Yes
Does the manual exclude launch control full throttle starts after 500 miles? Answer: No
Last edited by Phil1098; Nov 6, 2021 at 08:26 AM.
Melting Slicks
Joined: Aug 2018
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Cmon Rafa get out and drive that car. You were one of the first to get your C8 and I figured by now you would have over 2000 miles on it. I’m over 1800 on mine but the bad news is the last few days I woke up to a couple inches of snow on my lawn. I think I only have a few more rides left before it goes to sleep for the Winter and the snowmobiles come out.