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Discussion Starter #1
Hi everyone,
I recently updated the software on my Mazda 3, and during the process checked the DTC codes and saw that there were two, related to the USB and Bose system voltage being low. Unfortunately, I did not think to write down the codes, so I cannot look them up.

But I am hoping that someone has seen these codes before, and can offer some sort of explanation as to what might have caused this. I have noticed, however, that my Bose speakers seem to be quieter than usual, and that I have to turn them up higher to get the same volume, so that my be the effect that I am seeing.

Generally, I haven't done much to my car electrically, although I have installed an LED kit, but this is off of a completely different fuse, and I had the battery disconnected the whole time.

Sorry for the ramble, but I would very much like to know what's going on, and if there's a way to fix it

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