Changed fuel filter and the check engine light came on - Chevy and GMC Duramax Diesel Forum
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Old 07-28-2011, 01:02 PM   eBay Motors  #1 (permalink)
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Question Changed fuel filter and the check engine light came on

I just changed my fuel filter and when I started the truck the check engine came on. This has never happened before. Has this happened to anybody and if it has what was it? The only thing I did different this time is I used a Wix Fuel filter instead of a AC Delco. This is the first time I use Wix fuel filter, I always use AC Delco fuel filters. So I dont know if it has to do with the different brand and fit. Thanks for your help.
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Old 07-28-2011, 02:04 PM   eBay Motors  #2 (permalink)
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we're going to need the code to help. I personally haven't had it happen to me but if you get the code read someone should be able to help
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Old 07-28-2011, 02:29 PM   eBay Motors  #3 (permalink)
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Some are going to tell you it's probably the WIX filter, highly doubtful. Run by AutoZone and have the code read and post back.....
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Old 07-28-2011, 02:30 PM   eBay Motors  #4 (permalink)
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You might have got some air in the lines. Try driving it a few miles and see if it goes away.
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Old 07-28-2011, 02:34 PM   eBay Motors  #5 (permalink)
saw what you did there
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reset the code, see if it comes back
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Old 07-28-2011, 06:47 PM   eBay Motors  #6 (permalink)
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I got it scanned and it gave me Code P6078 twice. Does have anything to do with the fuel filter replacement? Thanks again for your help.
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Old 07-28-2011, 06:58 PM   eBay Motors  #7 (permalink)
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That does not sound like anything-- never heard of a code that started with a P6-- !
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Old 07-28-2011, 08:17 PM   eBay Motors  #8 (permalink)
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like he said^ ive looked that code up and cant find shit.. thats not saying there isnt one but never heard of them starting with that
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Old 07-28-2011, 08:48 PM   eBay Motors  #9 (permalink)
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dumb question but did you plug the wires back in fully
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Old 07-29-2011, 08:26 AM   eBay Motors  #10 (permalink)
saw what you did there
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I bet it's P0678 ?

site:duramaxforum.com P0678 - Google Search
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