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2015 Why did Maintenance Mode start?

3200 Views 13 Replies 10 Participants Last post by  canehdian
As it is elsewhere, it is very cold in Toronto this week. The ICE on my 2015 has run every day for long periods of time over the week. I have burned at least 3 liters and gone over 30km with the ICE running.

So why did Maintenance Mode execute this morning? What was the purpose of the 10 minute MM run given all the exercise the ICE had this past week due to ERDTLT?
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One of the major goals of EMM is to drive all the moisture out of the engine oil. For this to happen, the oil temperature has to get up near the boiling point of water. ERDTT doesn't get it that warm, which is why it doesn't reset the EMM counter.

If you're hitting ERDTT routinely but not using the engine otherwise, it might not be a bad idea to use Hold mode occasionally as one poster suggested. That will prevent you from getting EMM (assuming the car had time to fully warm the engine during that run.)
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