You won't find it behind the engine cover inside the van...it will be located in the front of the motor on the Throttle body inlet. On my 05 4.8 it is attached with 2 screws and is no bigger then 2 inches across...I can't speak to what it looks like on a 2010, but...Why not stop at a parts house and ask them to look up the senor for you van, have them pull it off the shelf and look at it, then yu will know what you are looking for....