cruiser.? last time I removed the gas cap and replaced it and 200 miles later the lights went off. Why does this happen and does anyone have any possible explaination or suggestions on what I can do other than take it to Toyota?

go to auto part store like autozone and get a free check engine light and see what the code is? once you know the code it is easyer from their engine light could be sensors to fuel injector to catlic converter?