Check Engine Light
Thread Starter
8th Gear
Joined: Dec 2019
Posts: 8
Likes: 2
From: UpNorth, MI
Check Engine Light
My 2017 Stingray has been a terrific car since I got it in 2019. Came to me with 3541 miles already showing. Other than tires it has not given me any trouble until 2024 when the "check engine" light came on. A code check showed transmission. The light went out. Same thing happened in 2025, and again now in 2026. There has never been problems in normal operation of the vehicle with or without the light. The only similarity in these three incidents is that the car had recently come out of a 5 month winter hibernation. I have been given several different guesses on the cause and solution for this and the costs range from OK to a new C-8. Now, someone in the dealership where I got it told me this is somewhat common for C-7s. His belief is they do not like to sit. Has anyone on the forum ever experienced this problem?
CF Community Team
Joined: Apr 2016
Posts: 14,120
Likes: 7,411
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
2024 C6 of the Year Finalist - Unmodified
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
Buy a cheap code reader on Amazon or Harbor Freight so you can see exactly what the code is
Melting Slicks
Joined: Feb 2018
Posts: 2,157
Likes: 1,032
From: North Texas
I'll bet that its the thermistor in the lower wiring harness inside the trans.
If you determine it is the thermistor it would be a good time to get the triple flush with Mobil1 Blue Label if it has ever been done.
If you determine it is the thermistor it would be a good time to get the triple flush with Mobil1 Blue Label if it has ever been done.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
7th Gear
Joined: Dec 2025
Posts: 7
Likes: 1
From: San Francisco Bay Area
Here's a list of transmission-related codes, and you can see there's quite a range of possible issues.
https://www.mytransmissionexperts.co...-do-they-mean/
Race Director
Joined: Mar 2010
Posts: 15,996
Likes: 824
Causes for a "check engine" light can be frustrating to understand and/or diagnosis. We want a chance to look into this further alongside your dealership so you can continue to enjoy your Corvette in the warmer weather. To get started, please fill out our support form at https://s.chevy.com/support-request so a member of our team can follow up with next steps of assistance.
Thread Starter
8th Gear
Joined: Dec 2019
Posts: 8
Likes: 2
From: UpNorth, MI
I am trying to respond to your question. I keep trying to log-in to your site and my password is rejected! That failed password works to get me into this site, but will not allow me to access the GM site. For whatever reason this site is giving me as many problems as the damned light. Please try me at my e-mail address: davidb@dnaco.net. I KNOW that address and site are working with no errors.
Advanced
Joined: Feb 2026
Posts: 78
Likes: 25
I am trying to respond to your question. I keep trying to log-in to your site and my password is rejected! That failed password works to get me into this site, but will not allow me to access the GM site. For whatever reason this site is giving me as many problems as the damned light. Please try me at my e-mail address: davidb@dnaco.net. I KNOW that address and site are working with no errors.
im pretty sure you have to join the gm site to get in there. This site isnt part of the gm site as far
as I know.
CF Community Team
Joined: Apr 2016
Posts: 14,120
Likes: 7,411
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
2024 C6 of the Year Finalist - Unmodified
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
2021 C6 of the Year Finalist - Unmodified
A “fail” emoji
Thread Starter
8th Gear
Joined: Dec 2019
Posts: 8
Likes: 2
From: UpNorth, MI
Possibly you could suggest howI mention something I have not been able to `find out? All I have been told was "It's a transmission code." My code reader read nothing. Where do you expect me to look next?
Advanced
Joined: Feb 2026
Posts: 78
Likes: 25
why don’t you take it to an auto parts store
that will read it for you? See if they find any codes
Administrator
Joined: Mar 2001
Posts: 368,136
Likes: 24,733
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran