gumbiegumbie Posted December 30, 2015 Share Posted December 30, 2015 I have a 8-4 EUP code coming and going on and off. The truck runs fine either way? Reckon this is just a glitch not needed to be worried about or is it a sign of something to come? Quote Link to comment https://www.bigmacktrucks.com/topic/43326-eup-code-coming-and-going/ Share on other sites More sharing options...
Challenger Posted December 30, 2015 Share Posted December 30, 2015 Ive seen EUPs code when they are cold and go out when it warms up. If it runs fine you dont need to worry about it. Its more of a nuisance seeing the light come on. Will it be a problem? Maybe, maybe not. Is possible another EUP could fail before the one kicking a code. Im sure there are alot of guys on this site running around with the random EUP code. If the malfunction light doesnt bother you and the truck runs fine, I wouldnt worry about it. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/43326-eup-code-coming-and-going/#findComment-317916 Share on other sites More sharing options...
gumbiegumbie Posted December 30, 2015 Author Share Posted December 30, 2015 Now that you mention it, it does only come on first thing of the morning when its cold outside once the truck is warmed up a little I never see it. I think you're right, as long as it stays running good I'm just going to let it ride. Thanks for the info Quote Link to comment https://www.bigmacktrucks.com/topic/43326-eup-code-coming-and-going/#findComment-317935 Share on other sites More sharing options...
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