Check Engine Light
Thread Starter
6th Gear
Joined: Dec 2019
Posts: 6
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?
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Joined: Feb 2026
Posts: 70
Likes: 21
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?
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Joined: Apr 2016
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From: Pittsburgh
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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: 2,131
Likes: 1,016
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.
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7th Gear
Joined: Dec 2025
Posts: 7
Likes: 0
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/