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Do failed battery blend doors always throw a code?

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Do failed battery blend doors always throw a code?

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Old 11-10-2016, 07:24 PM
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Join Date: Jul 2016
Posts: 173
Default Do failed battery blend doors always throw a code?

I am getting symptoms of my car that lead me towards the blend door or maybe the thermistor or wiring harness of the battery. It seems like the battery will be getting cold or hot at times because the assist is low and it just wants to rev wildly when it hits even the slightest hill. Sometimes it will go to 4k almost immediately on what I guess would be about a 2% grade if that. I have never gotten any codes, it almost always gets poor mileage, but sometimes it will randomly get what it used to which was 31mpg at 70mph cruising on the highway. Lately I am looking at 25 on a good day and 22 on a bad one. That is with the engine fully warmed up on relatively flat ground resetting the gauge once I'm at cruising speed for a while.
 
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