Need urgent help! 2015 6 GT immobilized - Page 2 - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #11 of 13 (permalink) Old 03-15-2019, 09:22 PM Thread Starter
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Originally Posted by waughoo View Post
Great news!! How did you determine it was the battery? As for the codes, typically, removing the battery leads for a while will clear stored codes. That said, it would be a bit more interesting to find out what the codes are before you clear them.
That was my very first thought when my wife said the window wouldn't go up after rolling it down to speak to the cop. However, once I got home and tried to start it, the immobilizer sign and the clicks threw me off and I went on the phantom chase for the inertia switch/accident sensor. The funny part is that I tried to jump the battery and it must have been completely dead that it didn't work. That further pointed towards an immobilizer sensor but just before I towed it to the dealership, I tried with a spare battery and it started right up.
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post #12 of 13 (permalink) Old 03-15-2019, 09:29 PM Thread Starter
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Originally Posted by MadStyle View Post
Does not happen very often but sometime a very low voltage near death battery can throw a check engine light, but it would be wise to still get that check engine light fault read to find out if anything else may be wrong with the car.
I think that's exactly what happened at the very beginning. Somehow, hitting the pothole entirely killed the battery which was near death anyway or the leads came loose just for a bit that cut off the power. She pulled over to the side (with the engine off already) but the battery is powering up all electronics. While she was sitting there calling me, Geico and 911, the battery completely drained and that was it. I feel like a Boeing 737 max mystery here!! Oh, how much I wish these cars had black boxes and the data can be downloaded to analyze and re-create..
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post #13 of 13 (permalink) Old 03-15-2019, 11:33 PM
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Pothole causes engine to die due to damaged battery

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Originally Posted by IncTomi View Post
Just to close the loop on the issue, it was the battery!!! However, I still don't understand the correlation between the car initially turning off when hitting the pothole. The check engine light is on but I probably just have to clear the codes. Thanks everyone for the suggestions and help.
This is exactly what I was going to say!
The pothole was large enough to crack one of the internal plates in the battery. Even with a working alternator.

With a plate cracked the circuit was opened and no current.
I have seen multiple batteries die this way.


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Last edited by DrFeelGood; 03-15-2019 at 11:35 PM.
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