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Old 04-24-2026, 06:09 PM   #1
db2022cs
 
Drives: 2023 2SS 1LE
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Issues with car, CANbus communication or something

I have been having issues with my 2023 Camaro SS 1LE for quite some time now. I finally broke down and bought an Autel auto scanner and I found some troubling things from the diagnostic report. I have had this car to a mechanic, and to a Dealership. I had also gotten the BCM recall when I went last. The car behaves fine, it drives fine. The issue I have been having I had thought was with the eLSD but this could be a deeper issue that is causing issues with the eLSD I have been having. If anyone is a bit more experienced and can maybe see some patter here. I take the car in next week to a performance shop to look at it.

The attached pdf is a diagnostic report.
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File Type: pdf 2026-04-24_14-41-06 edited2.pdf (2.76 MB, 30 views)
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Old 04-25-2026, 07:58 PM   #2
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What brought this concern to your attention? An engine light? A drivability concern? Random probing?
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Old 04-25-2026, 10:43 PM   #3
db2022cs
 
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Quote:
Originally Posted by bishopts View Post
What brought this concern to your attention? An engine light? A drivability concern? Random probing?
About a year ago, my car started having weird issues with the eLSD, what I thought were purge events to attempt to get any air out of the hydraulic system. This would lock up the eLSD clutch packs in an attempt to evacuate air. Well, my car was doing it way too often, way too slow and at the wrong times. This made something that you shouldn't be able to feel, very obvious when you first start to drive the car and especially on small curved roads at low speed. Once these events go through, it happens about half a dozen times or so, the car behaves perfectly normal. No lights pop up or anything. Just that one symptom that drove my crazy.
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Old 04-25-2026, 11:52 PM   #4
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so can bus 1 seems to be the common between all of this mess. the problem is that can bus is everywhere. its hard to say where to even start to diagnose this. visually inspect all the wiring around the differential but dont get blinders on it thinking that the diff wiring is the problem

pin 6 and 14 are can bus 1, so at least you have an easy access point to diagnose from.
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Old 04-26-2026, 01:05 AM   #5
db2022cs
 
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Quote:
Originally Posted by bishopts View Post
so can bus 1 seems to be the common between all of this mess. the problem is that can bus is everywhere. its hard to say where to even start to diagnose this. visually inspect all the wiring around the differential but dont get blinders on it thinking that the diff wiring is the problem

pin 6 and 14 are can bus 1, so at least you have an easy access point to diagnose from.
Thanks for the input. I am starting to think the headers I had installed a year and a half ago could have done some damage to some wiring. I had asked about this during the install from the shop I went to, they had moved passenger side harness out of the way and covered it in heat resistant cover. They also primarily work on Corvette's and Camaro's so hopefully they can easily diagnose would could be the culprit.
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Old 04-26-2026, 08:54 PM   #6
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So, I got under the car today to just look at as many wires or connections as I could. As I got under there, the first connection I looked at, right where I think this goes into the NPP valve, there is a partially melted wire and I can see that it may have gone through to the metal in the wire. Is this a possible cause of my issue? Even though it is at the NPP which still has full function, I assume that the CAN bus network could have issues with communication integrity being affected thus a lot of modules are coming back with intermittent communication loss. I will have the shop I go to Wednesday look at it, I will also look at replacing this if it's possible. I think it might just be an extension. The shop that installed my aftermarket Corsa exhaust did not take the proper precaution getting that harness off the hot exhaust.
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Old 04-30-2026, 09:04 AM   #7
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This was my issue, after a year it has finally been resolved. Those of you with aftermarket NPP exhausts, make sure you secure the wire extensions away from the exhaust. Took a year for mine to melt through.
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Old 04-30-2026, 01:47 PM   #8
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Glad you finally got the issue resolved!
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