Quote:
Originally Posted by CalgaryFan1988
I have a Pontiac Vibe GT with the Toyota Celica GTS engine. It calls for Premium gasoline, if I put in regular gas the check engine light comes on. I was told that it is because of emissions sensors in the car. I put Premium in and a couple tanks later the light goes back off.
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It's not the emissions sensor that gives you the CEL. It's the knock sensor. You can run a chip to re-map it to regular fuel, but I wouldn't bother. You've actually got a pretty high compression ratio in that, IIRC, with it being the VVTL-i.