2020 MDX Hybrid Blue Dash Temp Light - Acura Forum : Acura Forums
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post #1 of 3 (permalink) Old 11-02-19, 01:52 PM Thread Starter
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2020 MDX Hybrid Blue Dash Temp Light

Anyone know what the blue “C” with a thermometer dashboard light is trying to tell me? Lower left near the battery meter. It turns on when I first start the car, then shuts off shortly. I presume blue means not concerning. Can’t find anything in manual or web-searching. My theory is that it’s a “frozen roads” warning, but it came in today during 48 degrees weather?
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post #2 of 3 Old 11-02-19, 11:04 PM
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I think that is the low temperature for the coolant. I don't know if the battery packs use the engine coolant or a separate cooling system on cold mornings? I know the battery packs are not as efficient and can't discharge full range when too cold. I usually see the blue light on for a few minutes first thing on cold morning before turning off.

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post #3 of 3 Old 11-05-19, 08:24 PM
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It is just telling you the coolant is cold. I think itvwill flash on when coolant is below the cabin temp set point, telling you the heater will not blow warm air.

The hybrid battery pack does not have coolant circulating through it. It is much too hot for the batteries. The battery pack heats up just from discharge or charging.
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