To find the information you need:
1. Find your Odyssey's year and engine code: This information is usually found on a sticker inside the driver's side doorjamb or in your owner's manual.
2. Search for a repair manual: Use the year, make, model, and engine code to find a repair manual (Haynes, Chilton, or a factory service manual) either online or at an auto parts store. These manuals will have diagrams and detailed instructions.
3. Use an online parts diagram: Many online auto parts retailers (like AutoZone, Advance Auto Parts, etc.) have searchable parts diagrams. Enter your vehicle information and search for "camshaft position sensor" or "CMP sensor." The diagram should show its location.
Caution: Working on your vehicle's engine can be dangerous. If you're not comfortable doing this yourself, it's best to take your Odyssey to a qualified mechanic.