2003 Odyssey Van

Right van door. Particularly when cold. On all right turns the door rattles VERY noticeable. Rattles on the straight away, but never,seldom on a left turn. Applying hand pressure on the window on the panel door eliminates the rattle entirely

Not sure which door you mean.

If you’re talking of the front passenger door, remove the door trim (panel) and inspect.

Same goes for the sliding door.