Electrical Issue

[Rky Mtn ST]

Went out this morning, and my 25 ST was dead. Dead-Dead. Had to use the physical key to open it. Tried jump starting it, to no avail. Called roadside assistance, who got it started with a stronger jump-box. Said my battery was down to 5 volts. Only 4,600 miles on it. Always happens on a weekend. Things were acting strange over the past week. I keep my lane assist turned off, but it turned itself on, and my easy exit turned itself off as well. All this after the latest OTA update. Goes to the dealer on Monday. Anybody else experience stuff like this?

 

[South Cackalacky]

Gotta get mine replaced tomorrow. Been taking 4 cranks to turn over lately. I knew this cold weather was going to prevent it from cranking. When out this morning at 28 degrees. Won't crank, lights flashing. I don't know about OTA I've turned off the Connectivity settings. I guess almost 6 years on the original factory battery. I would say it served it's life

 

[Rky Mtn ST]

Gotta get mine replaced tomorrow. Been taking 4 cranks to turn over lately. I knew this cold weather was going to prevent it from cranking. When out this morning at 28 degrees. Won't crank, lights flashing. I don't know about OTA I've turned off the Connectivity settings. I guess almost 6 years on the original factory battery. I would say it served it's life

Mine is good now. Battery shows 12.4 volts at rest, and 13.2 when running. Gonna keep an eye on it for now. Dreading that cold weather could kill it.

 

[KCM]

Weird things start happening when the batteries start dying on these new vehicles. On my Dad's 2018 Fusion Sport, one of the first glitches with a bad battery is that the passive entry will not work on all doors except the drivers. Also affects the seat memory. On his 2018 and my 2019, if the car sits for a month without driving, the battery is dead. Have not experienced a dead battery with my 2020 ST though. It sits for that long with no problems.

Batteries can go bad all of the sudden. You probably just got a bad one from the start. I'm also not sure that the Motorcraft batteries are that good of quality anyway. The dealer installed a new one in my car under warranty. Right at the two year mark it went bad, and guess what, that was the length of the battery warranty.