Just had this warning pop up right after I replaced both batteries this morning. Tested both batteries, good at 12.5V. Tested them while isolated from each other. Before I start the truck the dash reads <8V, but it starts fine and climbs to 12V, but the warning never clears. I did have an odd situation replacing the batteries. Took them to Sams Club since they were covered under warranty, but found out they weren't replacing them so I had to do it myself. I don't have issues replacing batteries when I have my tools handy. I'm not the tallest person, so I usually need a ladder which I didn't have. First install went great, a little hard installing the new one but got through it. Second one was a little tougher due to the tight space and again not having a ladder. Unfortunately the ground cable touched the power cable for a brief second while I was lowering the battery into position. Wondering if I blew a fuse somewhere, just don't know where to look.