EPB Failure 2010 California?

You need to do a load test on the battery to find out the true condition of the battery.

More than likely a battery issue, especially on a new to you car with an unknown battery history. (my 2014 purchase two years ago, had an 8 year old battery in it)
Look for a build date on the battery. What kind of battery is it?

Good news, your alternator is charging the battery.

 

Try a new battery.

 

Some Info here:
https://www.ferrarichat.com/forum/threads/epb-failure-etc.660863/

 

If it’s not the battery then it’s either a module or the switch.
I think you need find somewhere to diagnose what’s at fault
Fault codes popping up drives you mad with a car of this age you need to find a good independent close to you who will help

 

Check your brake switch. $44 dollar part plastic switch on top of the brake pedal. Just went through this on my 2017 T

 

Did you do the battery reconnecting procedure when you put in the new battery?

 

For some failure messages, a replaced battery will also require several start and drive cycles before elimination of failure messages. There may be other causes of your message, as indicated by others, but perhaps a passage of up to ten normal start and drive events before going to next possible problem source would help. Try doing the start and drive cycles without ever activating parking brake during the entire round of cycles. Maybe it will clear, and maybe it only comes on when parking brake is activated after trying this route. Process of elimination.

 

This sounds very similar to the problem I had in my 2011 458 when I first got it. They share the same EPB module. Mine would error randomly while driving and would stay on. After periods of not driving, the error would go away and then would eventually come back and beep like crazy. There was once where the ebrake was stuck in the locked position and I had to power cycle the car to get it to reset and let go. My codes read EPB ecu fault.

I ended up replacing the EPB switch, which also houses the ECU. Its an 800$ part but very easy to do yourself. After replacing it, the error went away for a few weeks. Although, it randomly came on again. I was fed up with the error at this point because I couldnt silence the beeping when the error popped, don't know why. I ended up getting rid of the AGM battery I had and installed a lithium battery and all my problems went away. Its been trouble free for over 5 months and over 1k miles.

I would pull codes again to verify its the EPB switch thats failed, replace that, and then swap to a litium battery.

 

You could calibrate the EPB electric parking brake. Section D3.07, "Calibrating the EPB electric parking brake" in the Shop Manual.

The information for the "battery reconnecting procedure" is in section F2.01 "Connecting the battery" in the Shop Manual.

 

Did you try to manually disengage the brake by physically turning the motor in the trunk with special key? Go to section 5 page 213 on your manual it will tell you what to do, it is not the best detailed but basically you put in the tool suggested with flexible end then turn it clockwise till it disengages the brake, then reverse the procedure, hopefully this should make it reset after turning car back on and driving it.

The one time I had the EPB come on it was due to the actual switch itself, I had removed the under dash to add a back up camera disconnecting the park brake switch, when I reconnected it I did not connect it properly, gave me warning light could not engage or disengage brake, after sometime I refitted it properly voila it worked again.

Goodluck

 

I am having a similar problem with my 2010. it comes up with epb fault regularly but not always. Sometimes the brake will work sometimes not. When it will not come on I can try 3 or 4 times then it will eventually come on normally.
Im waiting to get it in to the garage to get it fixed but I was hoping it would be something simple.