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Old 01-16-2015, 07:15 AM   #1
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Eng Maint Light

Has anyone in the Alpine Coach Community experienced an Eng Maint Light? The manual says it's not an emergency situation and Cummins says to bring it in for service. Just wondering what components might cause this or is it just a reminder for normal service interval. Thoughts?
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Old 01-16-2015, 08:34 AM   #2
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I have this occur due to a clogged fuel water separator filter.
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Old 01-16-2015, 09:16 AM   #3
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I also had an engine light come on as a result of the fuel/water separator filter but I had also noticed slight intermittent hesitation in power which grew worse quickly; especially under load (such as accelerating or climbing a hill).
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Old 01-16-2015, 10:43 AM   #4
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If the light stays on, there should be a diagnostic code stored. Once the code is retrieved and interpreted, you will know which system is triggering the fault.
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Old 01-16-2015, 03:01 PM   #5
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Mine comes on every now and then. It goes off without me doing anything. If it ever stays on, then I'll look into it.
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Old 01-16-2015, 04:46 PM   #6
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Cummins can download the error for you.


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Old 01-16-2015, 06:21 PM   #7
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You didnt mention what model and year of Alpine you have so most of us have to guess what might be going on. One potential cause is above average intake manifold temps [eg above 150 degrees]. When you start off on cold/cool mornings, engine temps havent warmed sufficiently to activate the engine fan so the boost air going thru the CAC isnt being cooled enough. You can watch this process unfold on Silver Leaf if you have the capability.....
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Old 01-17-2015, 07:54 AM   #8
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Thanks for all the quick replies to my post. The Eng Maint light stays on all the time. I'll start by draining the Fuel/Water Separator and checking the electrical connector on it and go from there. I've made an appointment with Cummins to check the codes since it's time for my annual service anyway. BTW, my Alpine Coach is a 2004 40FDTS with a Cummins 400ISL engine and Allison 3000MH tranny.
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Old 01-17-2015, 08:16 AM   #9
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I just remembered I also had this happen and had to add coolant in order to turn the light off.
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