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Old 02-09-2019, 11:32 PM   #1
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DEF check engine warning light on dash

2018 Newmar King Aire. I am getting a yellow check engine and SCR warning light on my dash. DEF gauge is showing tank is empty, but DEF tank is 3/4 full. Also getting fuel gauge showing empty, red warning light, periodically on dash and tank is 1/2 full. Any suggestions on where to check?
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Old 02-20-2019, 06:36 PM   #2
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DEF check engine warning light on dash

B painter,
Has your coach set for awhile. I have the same problem with my fuel gauge if I let it set for awhile.
I suggest you take it for a drive and see what happens. That works for me.
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Old 02-21-2019, 07:23 AM   #3
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It could mean you have a bad sensor in your DEF system. It happened to me a couple times since I’ve owned my Eagle. Although I have a Freightliner, the problem could be the same. I’d get it to a Spartan shop and get the fault read. On mine, if I let it go to long, the engine may derate.
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Old 03-02-2019, 09:11 AM   #4
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Thank you...had to replace the DEF sensor unit.
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Old 09-01-2019, 06:48 PM   #5
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Originally Posted by Bpainter00 View Post
2018 Newmar King Aire. I am getting a yellow check engine and SCR warning light on my dash. DEF gauge is showing tank is empty, but DEF tank is 3/4 full. Also getting fuel gauge showing empty, red warning light, periodically on dash and tank is 1/2 full. Any suggestions on where to check?
I just had the same problem def sensor was bad and had to be replaced
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