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Originally Posted by 2018blackss1le
I really need help with this one.... again. My car, 2018 ss 1le randomly goes into key learn mode. If I don't try and start the car in 2 days the battery is stone cold dead, where I can't even use the remote to unlock the doors. It was fine for 3 months and now it's doing this again. Originally turning off the wifi in the radio settings I thought fixed it but now I'm back to the same situation. I'm assuming I have a bad bcm or a bad ground. The stealership is no help. The keys work and keyless works, but when I push the start stop button it says key learn mode pending, only sometimes. Why is it going into key learn mode?
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Any aftermarket parts on the car? Tail lights, cameras, etc.? If so, put it back to stock as aftermarket crap are notorious for keeping the BCM awake when it should be asleep, killing the battery with parasitic drain.
Low voltage and dead batteries do all sorts of Bad_Things(TM) to the modules in the car. Charge it up and stick a tender on it.