hey bro i have the exact same issue some reason car act like it's losing battery power screen says shutting down to save power ac goes up then down computer icons going crazy, hill top, brakes, battery light. sensors etc. i have a new battery and new alternator still same problem one time windows didn't won't to go up sometime in traffic car sounds like it want to shut off i know a little about cars and can say i very much doubt it's the computer something feeding the bcm bad reads it'll make since it's a battery sensor since it seem like it's losing power, i ordered the part today the negative battery post with sensor and i got a strong feeling this is the issueUpdate: I replaced the negative battery cable with sensor (AV6Z10C679M) and so far have logged over 1000 miles with no problems. While I had the battery accessible I did a little snooping around with a flashlight and noticed that when the battery was replaced by the Ford dealership in April, they neglected to clean out the corrosion/acid deposits in the bottom of the battery box left by the previous battery. Thoroughly cleaned before reassembling, and also loosened, cleaned, and re-torqued the now-rusty bolts in case they are part of the grounding system.