GT86 Incorrect Fuel Composition Error

Hey, I'm having a weird issue with my 2020 Toyota GT86 with a gasoline engine. It's got about 64547 km on it. The check engine light keeps coming on, and the engine has stalled at idle a couple of times. I scanned it, and it's throwing an error related to incorrect fuel composition. I've tried fuel additives, but nothing seems to work. Could it be that I got a bad batch of fuel? Or is there something else I should be looking at?

4 comment(s)

I had a similar problem with my GT86. I assume you didn't accidentally put E85 in it, right? Did you check all the cable and plug connections related to the fuel system? Maybe a defective connection is causing the issue. Have you noticed any engine knock or other unusual sounds?

E85? No way, I always pay attention at the pump. Now that you mention it, I haven't actually checked the connectors. Which ones specifically should I be focusing on? And yes, sometimes it feels like the engine will die out if I don't give it gas.

Yeah, it sounds like what I had. The problem ended up being a loose connection to one of the sensors in the fuel system. Check all the ones you can easily access first. Honestly, though, with those symptoms and the error code, it might be worth taking it to a workshop to be sure. They can diagnose it properly. I ended up paying 95€ for them to fix it.

Thanks so much for the advice! I'll check the connections myself first. But, yeah, if I can't find anything obvious, I'll definitely take it to a workshop. At least now I have a better idea of what to tell them. Thanks again!

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