Check engine light
Thread Starter
Instructor
Joined: Feb 2020
Posts: 129
Likes: 69
Check engine light
It looks like I am batting 1/3 on C8s.
i had an early vin 2020 with transmission issues. Owned it for 9 months and it sat in a service department for 6 of those months. I then had a 2023 HTC that was great with no issues.
Now I have a 2024 z06 with 900 miles and the check engine light came on. The dealership can’t look at it for a week.
My question is that the Onstar diagnostics checks out fine. Doesn’t show any errors. Anyone experienced that? From reading other posts it looks like normally Onstar will give error codes.
thank for any info.
i had an early vin 2020 with transmission issues. Owned it for 9 months and it sat in a service department for 6 of those months. I then had a 2023 HTC that was great with no issues.
Now I have a 2024 z06 with 900 miles and the check engine light came on. The dealership can’t look at it for a week.
My question is that the Onstar diagnostics checks out fine. Doesn’t show any errors. Anyone experienced that? From reading other posts it looks like normally Onstar will give error codes.
thank for any info.
Popular Reply
Sep 21, 2024, 11:31 AM
Burning Brakes
Joined: Dec 2006
Posts: 1,146
Likes: 507
Every Z06 should come with a code reader
Drifting
Joined: May 2006
Posts: 1,655
Likes: 293
From: Canton Georgia
Burning Brakes
Joined: Jul 2024
Posts: 784
Likes: 471
It looks like I am batting 1/3 on C8s.
i had an early vin 2020 with transmission issues. Owned it for 9 months and it sat in a service department for 6 of those months. I then had a 2023 HTC that was great with no issues.
Now I have a 2024 z06 with 900 miles and the check engine light came on. The dealership can’t look at it for a week.
My question is that the Onstar diagnostics checks out fine. Doesn’t show any errors. Anyone experienced that? From reading other posts it looks like normally Onstar will give error codes.
thank for any info.
i had an early vin 2020 with transmission issues. Owned it for 9 months and it sat in a service department for 6 of those months. I then had a 2023 HTC that was great with no issues.
Now I have a 2024 z06 with 900 miles and the check engine light came on. The dealership can’t look at it for a week.
My question is that the Onstar diagnostics checks out fine. Doesn’t show any errors. Anyone experienced that? From reading other posts it looks like normally Onstar will give error codes.
thank for any info.
see anything but then proceeds to send me report. If the infamous u0401 code, GM is still working on a fix and they told me okay to drive and dealer cleared
codes each time Very disappointing to experience when you drop so much to buy one.
Thread Starter
Instructor
Joined: Feb 2020
Posts: 129
Likes: 69
Safety Car
Joined: Sep 2011
Posts: 3,913
Likes: 395
From: Cary NC
My 2024 Z06 has had a CEL at startup and displayed no codes four or five times now. The CEL goes away after 2-3 drive cycles each time.
The first couple times it happened, my reader showed no codes,, so I asked OnStar and they could not find any either. So went to an auto store and their reader found nothing either. After that, if my reader showed nothing, I just would drive it and see if the light disappeared, which it did every time. I sort of wonder if it was a failure if the startup self test procedure.
The first couple times it happened, my reader showed no codes,, so I asked OnStar and they could not find any either. So went to an auto store and their reader found nothing either. After that, if my reader showed nothing, I just would drive it and see if the light disappeared, which it did every time. I sort of wonder if it was a failure if the startup self test procedure.
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Burning Brakes
Joined: Jul 2024
Posts: 784
Likes: 471
good indication it might be the fix GM us still working on. Mine did the same thing where light went off after a few days.
Team Owner
Joined: Feb 2005
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From: FL
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St. Jude Donor '05 thru '11,'19,'22,'25
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I have Blue Driver and it's been a huge help. Codes are junk. Sad we have to do this ourselves.
Instructor
Joined: Jul 2020
Posts: 175
Likes: 80
This exact thing happened to me yesterday, rando check engine light with no info on the driver info center, OnStar said no codes. Went to AutoZone and they plugged in and no codes, restarted car and CEL was gone. 2024 Z06.