MTV10

....But the trunk is closed.

Started happening two days ago... happens when I take off from a stop. Warning keeps coming up on the dash. See pic below.

Sensor must be losing contact... anyone experience this before?

Ls1toAMG

If it's anything like to hood sensor the mounting clips break. I fixed mine with a zip tie. Look for the sensor and see if it's moving around.

MTV10

I just took the whole assembly apart.
There are a few round 'teeth' that move around in there and set a plastic piece in place.

This plastic piece pushes up against a small little green valve. This is what seems to be loose.....

Doesn't seem there is any way to tighten it up. I'll just get a new part.