G6 Fault Code Issue

Sounds familiar! I had similar issues with my G6. Is the error message consistently the same, or does it vary? Could be a module freaking out. Have you tried using an OBD-II scan tool to read the specific code? Might give you a better clue what's going on. When I saw this, it turned out to be something to do with the car's computer, which needed a specific type of reflash. You’re not running any aftermarket tunes or anything, are you?

Thanks for the quick reply! The error message is consistent, yeah. I did use a scan tool, and it points towards a coding issue, something about incorrect vehicle configuration. Reflash? Is that something I can do myself, or am I looking at a workshop visit? Could it be as simple as resetting the codes?

Definitely sounds like the same problem I had. I wouldn’t recommend attempting a reflash yourself unless you're very comfortable with that kind of thing. You could brick the whole system. I bit the bullet and took mine to a workshop; they have the proper tools and software to recode everything. I was initially hoping to just reset the codes, but in my case, that didn’t solve the underlying problem. It kept coming back.

Appreciate the insight! Sounds like a workshop visit is unavoidable then. I'll book it in and mention the coding issue. They quoted me around 360€ to fix the problem, so I hope this solves it. Thanks again for your help!