12V Battery Fault reported while car at PPF/Ceramic shop. How do I prevent catastrophe?

[UsernameChecksOut]

I have my Mach-E at a detailing shop getting PPF and ceramic done and it's expected to be a 4-day job (yes, I'm getting "the works"). Into the second day now, my FordPass reports a message: "12V Battery Fault - Service Soon"

I suspect it's because the shop has the doors/gate open all day while they do their work. I'm not panicked, but I really don't want to pick up the car and then have the car go into shutdown mode on my way home.

I called the shop and told them about the fault. They said they'll look into turning off the interior lights etc. But I'm still concerned that they'll drain the LVB. I suggested that they can just have the car powered-on and hopefully the HVB will trickle charge the LVB while they work.

So once I pick up the car two days from now, any thoughts on how I can save myself from a massive hassle/calling roadside service for towing etc?

I was thinking that I could pick up a trickle charger/battery tender and then hook the battery up for a day immediately when I get home. Will this save/revive my battery?

Thanks in advance for any ideas!

Sponsored

 

[generaltso]

Don’t worry about it. That message is overly aggressive and is generated when the DC/DC converter kicks on to bring the LVB voltage back up. I see it every few days and have never had a real problem with the 12V battery.

 

[Cabel]

Mine did the same thing while getting ceramic/XPEL, called and the installer turned on the car to charge the LVB and closed the door. No problem when I picked it up.

 

[UsernameChecksOut]

Don’t worry about it. That message is overly aggressive and is generated when the DC/DC converter kicks on to bring the LVB voltage back up. I see it every few days and have never had a real problem with the 12V battery.

Ah, this is good to know. So what you're saying is that the car will try to save itself from total LVB failure by using the HVB and DC/DC conversion. ?

 

[UsernameChecksOut]

Thanks for the quick inputs!

I also found this in poking around. So I guess in worst-case scenario I can follow these steps too.
How to Recondition/Service Your 12V Battery | MachEforum

 

[UsernameChecksOut]

Mine did the same thing while getting ceramic/XPEL, called and the installer turned on the car to charge the LVB and closed the door. No problem when I picked it up.

Yep, this makes sense.

 

[GA dream car]

Same thing happened to me while getting ceramic and PPF. I had zero issues when I picked up my car a few days later. I think you’re probably fine. ?

Sponsored