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      09-16-2017, 01:03 PM   #25
houtan
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Drives: 2011 135i
Join Date: Jun 2013
Location: socal

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2011 135i  [9.85]
Ok, so a little update.

On 9/13 I charged the battery overnight from the terminals under the hood in preparation to get it tested.

On 9/14 I pulled the battery out of the car, showed 13.8 volts. I also took it to get tested at an auto parts store the same day, and the result was the battery was good. When I got home, I checked the volts and it read 13.57.

On 9/15 I checked the volts and it read 12.96.

On 9/16 I checked the volts and it read 12.91.

Based on those results, can I assume the battery is holding charge fine? Since it was holding charge, I went ahead and reinstalled the battery for now.

I also tried to check the condition of the voltage regulator, and failed. When I tried to unscrew the Phillips head screws, two loosened kind of easily, the bottom too were on much much tighter, and the heads completely stripped. I was so dang mad! haha. Oh well, if it is the regulator, I am going to just have to replace the alternator too.

So what I am going to do next is reflash my map and drive the car. If the code show up again during a drive, I am going to check voltage at the alternator to see if that is why the dme is showing no charge. I am also leaving the n20 sensor on for now.

Open to other recommendations/courses of action if you guys have any.
Appreciate 0