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Old 04-20-2016, 08:53 AM   #1
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MIL light on new Alegro Bus 45 UP 450 HP

My MIL light is on the display intermittently. Only 2500 miles on BUS. Also It will reach 195 degrees on a small grade in cool temperatures. Any ideas for me. Thanks, Dennis
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Old 04-20-2016, 08:58 AM   #2
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I had to google that one, couldn't figure out what a mother-in-law light would be.

Do diesels have an ODBII port, or equivalent? If so can you borrow a reader to see what the error code(s) is?
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Old 04-20-2016, 06:32 PM   #3
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The first thing I would do is check the antifreeze level. That seems to be about the most common cause for the light to go on and off. 195* is actually a good temperature to see. The newer diesels run a bit warmer than what they used to. 210* is not a bad temperature either.........
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