On my 93 Deville 75,000 miles on the way home today the SESL light came on but went off withen a minute several times the car seems fine we have had some very extreme weather here from -10 to 50 with a major ice storm withen a week I put some Dry gas in today to see if that may help. Any other sugestions would help and will it be ok to drive? Thanks Kraig

did you check to see what codes if any were stored?

I am not for sure how to check the codes, how do you do that. Thanks Kraig

turn the ignition switch to the on position and then simultaneously push the off and warmer buttons and hold for 3 seconds. You should then see codes flash across the Fuel Data Center. They will begin with the letter E or F. Write them down and let me know what they are.

Thank you so much for your help I stopped at the local Cadillac dealer and they seemed to think that my cataletic converter may be getting clogged due to me getting a rotten egg smell from the exhaust but they would not know what it was till they hooked it up to a computer at a charge of $75.00 so you are saving me alot of money. The code that came up is E44 that is the only one I saw. Thanks for your help and I will see what your reply is. Thanks Kraig

E44-Oxygen Sensor Signal Lean
code will be set when; 1. There is an oxygen sensor circuit fault giving a false lean indication or 2. When the air fuel ratio is actually lean due to a vacuum leak or fuel control system fault.

Thank you for the answer, now if it is a vacuum leak how will I find that out and what is a fuel control system fault could that be injectors or something? Thanks Kraig