2017 TLX V6 ~10K miles

My wife was leaving the coffee shop this morning and her car was totally dead, couldn't unlock door or anything. She used the key to open the door and found that nothing in the car would work at all. SHe popped the hood and checked the connections and everything was tight. I was on the way to help her and she called back to say that everything came on again and the car started right up.

She said last week while driving she got a "brake system problem" warning came on twice. It came up for just a second then went away.

Any ideas what this could be? I wondered if the battery terminal was loose but she said it was tight.

 

Not exactly sure, but when my A-SPEC was 1 week old, the climate control malfunctioned
Dealer claimed it needed a software upgrade; since then, it's been perfect
Probably a minor hiccup; go to the dealer, & let them diagnose, properly

 

I suggest taking it to the dealer and see if they can spot any error codes or anything. Just because it goes away, doesn't mean it's gone. As a matter of fact, taking it to the dealership to see if they can spot anything would be my first priority. Anyone giving a response here is shooting in the dark for something like this since the lights firing on the dashboard could mean anything, including nothing related to the warning being flashed.

BTW, God bless Cajun food. lol.

 

UPDATE.

When my wife got home I checked the battery connection myself and found the negative side was left loose when they repainted the hood a week ago. It likely disconnected slightly when she hit a bump. That explains the electrical outage.

I wonder if it was bouncing loose last week and causing the brake system fault. My dealer's service dept. sucks so I'm going to see if it comes on again before I spend the time dealing with them.