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Old 05-22-2020, 11:28 AM   #1
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Join Date: Apr 2018
Location: Western NY
Posts: 189
After replacing relays check engine light is on

I have a 2015 Chevy 4500 Coachmen. It was working fine a month ago and today no crank no start. Battery was good. Check a few other things and everything looked good. Swapped around the crank relay with the AC relay and it starts but with check engine light was on (it wasn't on a month ago). Replaced relay and still have check engine light on. Engine ran fine for 15 minutes and shut it down.

Any ideas on why the check engine light is on? I plan on taking it to AutoZone for a code read but looking for any other suggestions or past similar experiences.

Thanks and enjoy the weekend!
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2015 Coachmen Leprechaun QB220 (purchased 4/2018)
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Old 05-23-2020, 04:08 PM   #2
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Join Date: Oct 2016
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Quote:
Originally Posted by 125992 View Post
I have a 2015 Chevy 4500 Coachmen. It was working fine a month ago and today no crank no start. Battery was good. Check a few other things and everything looked good. Swapped around the crank relay with the AC relay and it starts but with check engine light was on (it wasn't on a month ago). Replaced relay and still have check engine light on. Engine ran fine for 15 minutes and shut it down.

Any ideas on why the check engine light is on? I plan on taking it to AutoZone for a code read but looking for any other suggestions or past similar experiences.

Thanks and enjoy the weekend!
I bought one of these several years ago. It simply plugs into any computer diagnostic terminal under the dash. They're all standard so it will work on any make. Not only will it tell you what code has been set (you can buy that specific part) but it will also provide a prompt to turn offf Check Engine light. I travel with one.
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