Ticking from 12v battery compartment

[alexose]

2023 Pro SR with 41000 miles. Everything's been perfect until today, when I noticed the following symptoms:

1. A wrench icon, with a "Powertrain malfunction / Reduced power" error message on the dash
2. Repetitive clicking emanating from the 12v battery compartment (see video)
3. Low voltage on the 12v battery. I measured 11.92 volts.

Anyone have a theory as to what's going on? I'm hoping it's just a bad 12v battery, but could it be something else?

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[TaxmanHog]

Not normal, sounds like a relay cycling at a pace I've never heard.

Was the truck essential off, accessory mode or run mode?

 

[alexose]

Not normal, sounds like a relay cycling at a pace I've never heard.

Was the truck essential off, accessory mode or run mode?

It happens when the truck is off. I noticed it immediately after opening the driver's side door.

Charging via my Level 2 home charger also seems to trigger it.

 

[Adventureboy]

I would first look at the 12v battery. If it is below 12v after driving the truck, that is suspect. It should be 12.5v or higher. Maybe take it to the dealer and have them test it. They'll replace it under warranty, probably.
Alternatively, put a decent charger (10-15 amps) on the battery and see if the clicking goes away. If it does go away, it again points to the 12v battery being low. Rule out the simple first
FYI, I'm on my second battery already on my 2023 and it looks like it will need to be replaced soon. Baby battery.

 

[RickLightning]

Sounds like the HVBJB to me.

Or, it's Ford's new Explosion Promise.

"Here at Ford, we want people excited about our vehicles. Therefore, in a random selection of vehicles, we've inserted explosives, which will go off on some random day, unexpectedly. Want a BANG for your buck? We at Ford will exceed your expectations."

 

[Adventureboy]

Sounds like the HVBJB to me.

That would draw down the 12v battery too. Good call.

 

[alexose]

HVBJB seems like a good bet. I'm keeping an eye on the battery voltage and it seems to be hovering around 12. So... that's something.

I got an appointment with the dealership on Monday, will post back with what I learn.

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