My wife's Crossfire 'check engine' light is coming on. The code is P0452, which I assume is the gas cap loose. I've triple checked the cap and it is secure and the seal looks to be OK.

I've reset it 3 times now and it still comes on after a short time.

I have noticed that that the 'handle' of the cap jiggles slightly, but the cap appears to seal. Is a slight jiggle of the handle common?

My E320 threw a simliar code years ago. Just secured cap properly and code went away. Not working with Crossfire. Suggestions?