Quite a few weeks ago I was exploring a scan tool on my 2020 Buick Envision. I inadvertently reset the battery. At or around this time, my auto start/stop feature stopped working. And lately I’ve noticed that my alternator is supplying 14 to 15 volts all the time the engine is running. Normal operation was usually 12.8 to 14 volts changing regularly. Although the battery is 5 years old it tests in great. I’m reasonably sure the reset caused this change. I’m really not concerned about this, but am more curious about why resetting the battery would result in the change. I’m not a fan of the auto/start function so I don’t miss that part also. My question is: Am I right by not being concerned by this, and is there any way to reverse this reset (assuming that’s the cause)?
That’s a good site, but the question is what is the consequences of registering a battery that is 5 years old, but still tests great. Will this change the charging rate to bad parameters or cause the start/stop system to stop functioning? And if so, is there a way to remedy this using the existing battery. My initial and uneducated guess would be to let this 5 year old battery run its course and not worry about it until I replace the battery. But it seems to me that there would be a way to reverse this accidental registration. But it could also be a coincidence that these symptoms appeared after the reset. Maybe even though the battery tests great the modules don’t agree and have other parameters that affect the charging systems behavior. I don’t know, that’s why I’m asking.
When you reset everything, it means you have to register the battery. You haven’t actually reset it. You just wiped out the registration. It’s lucky that the car even runs. If your battery gets disconnected the car may not run after reconnection. A dealer may have some idea of how to find the number you need. Bad news; to fix most problems it takes money. Answers? You may never get; at least not the ones that you would prefer. You can’t reverse the reset, you have to complete the reset. It looks like you need a new battery to get things working again. Estimated price is $300. Let us know how things work out.
My local shop I went to to get a new battery for GMC suggested we should get the battery from the dealer as it would have to go there to get programmed anyway for the remote start to work.
I’m pretty sure I’ve found the answer to my question. I’ve searched the internet again and still could not find any registration procedure for this vehicle. I also went to the owners manual. It suggest that this system uses real time readings of the battery’s current condition to help regulate the charging system and does not utilize an intelligent battery sensor. So the option to reregister on my scanner was moog. So I am going to assume that the battery management system is causing these symptoms due to it’s interpretation of the present condition of the battery. I guess I’ll just retest the battery and let my concerns go until I feel it’s time to replace the battery. Thanks for the input.