Low voltage alarm

[Hulk]

Ok I don't know if this is the right place for this question or not. I bought my truck, 2015 ram 2500, a year ago. No problems for the first six months then all of a sudden I get a low voltage alarm. The alarm was intermittent. I might not get it for a couple of weeks sometimes it would come on and off the whole day. I've had it to the dealership five times. First time it was they said it was the alternator but the truck always started fine. Then they changed the ECM, then ran new wires to the ECM and the last two times I drop it off and it sits out back for a week and I get pissed and just go get it.

I know this might sound weird but it seems like if I keep my def tank full it don't come on. I'm just putting this out here to see if anyone else has seen this and what your thoughts are. Thanks


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[Hulk]

I forgot to mention when I get the alarm the voltage never actually drops. I have checked it with a muti meter and also the display on the dash always reads 13 or 14 volts.


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