To find the sensor, you'll need to:
1. Identify your engine: Look for an engine code (e.g., OM651, etc.) on an engine sticker usually located in the engine bay or in your vehicle's documentation. This is crucial.
2. Consult a repair manual: Once you know the engine code, obtain a repair manual specific to your year and engine. This manual will have diagrams showing the exact location of all sensors, including the camshaft position sensor. A Haynes, Chilton, or similar manual will work, or you can often find diagrams online through reputable automotive websites or forums.
3. Use online resources: Search online using your specific E250 van's year, engine code, and "camshaft position sensor location." You may find images or videos showing the sensor's placement. Be cautious; always verify information from multiple sources.
Without knowing your specific E250 van's year and engine code, it's impossible to give a precise location. Attempting to locate the sensor without this information and a repair manual is strongly discouraged. Incorrectly working on your vehicle's engine could lead to damage.