I suppose that could be it, the check engine light isn't on so I assumed it was something extra. I don't know where the engine in this car came from...
I was able to work around the edges of the lens with a putty knife and it eventually came free, there was some sort of two sided tape holding it in....
I was able to remove the bolt from the rear of the solenoid, I then removed the internal siding valve and spring. Everything has been back to normal...