C8 problems
Instructor
Joined: May 2014
Posts: 217
Likes: 126
From: San Diego
I have a 2022 Z51 with 12300 on the clock and got the Idle Creep Temporarily Disabled message + CEL's. I think I know why it happened though. As I was coming to a gradual stop and the car was managing downshifts from 3 to 2 where the tac was below 1500RPM, I accidentally knocked my downshift paddle and it downshifted into 1 very abruptly and probably really upset the control module and threw codes P2854 and P2715 Permanent and P0700 Confirmed (checked codes with a reader when I got home). I lost even gears and creep capability. The next morning the CEL is still there but I have all gears and creeping capability. I think I'm going to clear codes and be more mindful. While possibly self induced yet doesn't SEEM to be a further issue, has anyone else experienced this in that type of condition where you might have interfered with the computer's decision making inadvertently?
Racer
Joined: Mar 2021
Posts: 289
Likes: 200
And, I guess, I get to go through the whole external filter changing regime yet again!
Instructor
Joined: May 2021
Posts: 233
Likes: 148
From: Minnesota
I have a 2022 Z51 with 12300 on the clock and got the Idle Creep Temporarily Disabled message + CEL's. I think I know why it happened though. As I was coming to a gradual stop and the car was managing downshifts from 3 to 2 where the tac was below 1500RPM, I accidentally knocked my downshift paddle and it downshifted into 1 very abruptly and probably really upset the control module and threw codes P2854 and P2715 Permanent and P0700 Confirmed (checked codes with a reader when I got home). I lost even gears and creep capability. The next morning the CEL is still there but I have all gears and creeping capability. I think I'm going to clear codes and be more mindful. While possibly self induced yet doesn't SEEM to be a further issue, has anyone else experienced this in that type of condition where you might have interfered with the computer's decision making inadvertently?
Instructor
Joined: May 2014
Posts: 217
Likes: 126
From: San Diego
I figured as much. The P0700 is still there but everything is fine. I have an appointment with a service department but hoping the codes just clear over the weekend and can cancel the appointment and just move on with life.
Instructor
Joined: Feb 2009
Posts: 217
Likes: 92
From: BRIGHTWATERS NY
Instructor
Joined: May 2014
Posts: 217
Likes: 126
From: San Diego
Update, CEL's disappeared. Not going to worry about it. If the car is happy, I'm happy.
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Racer
Joined: Mar 2014
Posts: 321
Likes: 84
From: Marco Island FL
[QUOTE=Samuel Clemens;1608107146]
Does the car sit outside a lot? Do you live in an extremely hot region? I like many others are curious why some cars have this issue and others don’t. You would think that with 3 replacement dashes the odds are that you would get a good one. Sorry to hear this. I don’t blame you for never buying another Corvette again. Sam
No, the car is parked in a protected condominium garage. I personally believe it is the high humidity (moisture) conditions in SW Florida. Probably use a water-based glue that gets hydroscopic from the moisture. Never had the issue with my 2014 C7.
Does the car sit outside a lot? Do you live in an extremely hot region? I like many others are curious why some cars have this issue and others don’t. You would think that with 3 replacement dashes the odds are that you would get a good one. Sorry to hear this. I don’t blame you for never buying another Corvette again. Sam
Race Director
Joined: Aug 2016
Posts: 12,763
Likes: 10,193
From: Garden Valley CA
[QUOTE=Stangslayer;1608151795]Do you use anything to clean the surfaces besides a cloth dampened with water or mild soap solution?
1st Gear
Joined: Sep 2019
Posts: 1
Likes: 0
I have a 2024 with 273 miles on it. Got a service engine light and had it taken to the dealership. They've had it for almost 2 weeks. They say they can't disgnose if it is a transmission problem because GM has to develop code to talk to the transmission. Is it me or does this sound crazy? With computers controlling everything now, I would think the diagnostic capabilities would be very extensive. I'm thinking about getting it to another dealership.
Instructor
Joined: Feb 2009
Posts: 217
Likes: 92
From: BRIGHTWATERS NY
Brother run for the hills...not sure where your located ....but if your on Long Island ...take it to Huntington Chevrolet...ask for Eric...he is the #1 GM Certified c8 Vet Tech on Long Island
Enjoy while you can.
Joined: May 2008
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From: 10th District Court OHIO
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Le Mans Master
Joined: Sep 2017
Posts: 5,767
Likes: 2,967
From: Rural NW Georgia. GO DAWGS!
2024 C8 of the Year Finalist - Unmodified
Enjoy while you can.
Joined: May 2008
Posts: 18,218
Likes: 3,357
From: 10th District Court OHIO
Ohio Events Coordinator
2025 Corvette of the Year Winner - Unmodified
2024 C2 of the Year Winner - Unmodified
2023 C8 of the Year Finalist - Unmodified
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St. Jude Donor '14 thru '26
Le Mans Master
Joined: Sep 2017
Posts: 5,767
Likes: 2,967
From: Rural NW Georgia. GO DAWGS!
2024 C8 of the Year Finalist - Unmodified
If I were you I would get out my manual and go through how to set up the car before I took it back to the dealer. It might save you some time.
Enjoy while you can.
Joined: May 2008
Posts: 18,218
Likes: 3,357
From: 10th District Court OHIO
Ohio Events Coordinator
2025 Corvette of the Year Winner - Unmodified
2024 C2 of the Year Winner - Unmodified
2023 C8 of the Year Finalist - Unmodified
2022 C2 of the Year Finalist - Unmodified
2019 C2 of Year Finalist (stock)
St. Jude Donor '14 thru '26
Racer
Joined: Feb 2023
Posts: 400
Likes: 349
From: Camp Hill, PA
Well I guess I need to go to the dealership...Was driving this morning to a Cars and Coffee event and started getting a message "Limited to 82 mph" on the screen. Stopped at gas station, checked doors, frunk, trunk and left door open for 2 minutes. Still getting message..any thoughts?