My service soon light came on and stays on,What do I need to look for ? on 1996 Chevrolet Corvette

I have had this car for 3 years and I have probably put 125 miles on it.It has right at 91000 miles on it and I stopped to put gas in it well I did not put the 93 octane in it.After driving it to church and then back home I noticed the service soon light was on.Where do you think I should start looking or can someone point me in the right direction for an answer to my problem?

Asked by for the 1996 Chevrolet Corvette
If the Check Engine Light/Service Engine Soon light illuminates while you are driving, the car's on board computer sees a fault in the engines management system that is causing an excess amount of pollutants to be emitted from your car. This could result in engine damage if left neglected. Some problems that can cause the Check Engine light to stay on may take two "drive cycles' to complete before illuminating the Check Engine Light. The computer sees a problem and looks for an identical set of circumstances to occur to confirm that it has indeed seen a problem before turning on the light. A Check Engine light that continually flashes while you are driving is serious and is a sign that the computer sees a problem that seriously risks damaging the catalytic converter which may result in an expensive repair or even may cause a fire! Diagnostic codes are stored in the vehicle's computer and can be retrieved using a scantool that communicates with the computer in your car. We have in our Repairpal website an encyclopedia with in depth articles about computer, and computer control systems, emission and driveability problems.
See if your friends or workmates, or family can recommend a reputable honest repair shop in your area.
Thank you very much for your help it gives me something to on.
Thank you very much for your help it gives me something to on.
1 more answer , 1 more comment
You may have a problem where the gas cap attaches. May not be on tight. That would set a code for the evap system. Have codes pulled and addressed as needed.
Thank you for your help,I am lost on these newer cars.