2012 Subaru outback intake coming loose.

Okay, I have a 2012 Subaru Outback and I got the
dreaded check engine light, blinking Brake light,
blinking cruise control light, and solid traction
control light and my remote start wouldn't work
when it got cold. I took it to a local Subaru
specialist and it was the P2096 code. When he
checked my car, my intake had come loose. Well
he tightened it up about two weeks ago and I was
driving down 5th end street (2019 WA state
Snowpocolypse), a person in front of me decided
at the last minute to turn,  putting their turn signal
on while turning and I slid and my dashboard lit up
again. So, what can cause an intake to come
loose? Fortunately I have a warranty on it and it
should be covered (the dealer won't work on it by it
would be a "conflict of interest) I bought the car in
October. Car still runs fine but still what can cause
that?