My 93 S-10 4.3 Z, has recently started to throw a SES light right after startup, usually when its colder. It only stays on for about a mile or so, then shuts off. I read the code, and its a code 43 E.S.C., now that i know what the code is I still am completely clueless as to what is causing it. Can anyone point me in the right direction as to what may be going wrong with it. The truck runs fine, but I think that my mpg are dropping significantly. Any help will be greatly appreciated.
Dennis