Where is o2 bank1 sensor 2 on a 1997 e-150 ford van?

The exact location of the O2 sensor (bank 1, sensor 2) on a 1997 Ford E-150 van depends on the engine it has (e.g., 4.2L, 4.6L, 5.4L, 5.8L, 7.5L). There's no single answer.

To find it, you'll need to:

1. Identify your engine: Check your vehicle's documentation or the engine bay for the engine displacement.

2. Consult a repair manual: A repair manual specific to your year and engine will show you a diagram of the exhaust system and the location of all the O2 sensors. This is the most reliable method. You can find these manuals online (often as PDFs) or at auto parts stores.

3. Use a parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to enter your vehicle's information and see diagrams of the exhaust system. This might show the sensor's location.

General Information (But Not Guaranteed for Your Specific Van):

* Bank 1: Refers to the side of the engine containing cylinder #1.

* Sensor 2: This is the downstream O2 sensor, located after the catalytic converter. It monitors the efficiency of the catalytic converter.

Important Note: Working under a vehicle can be dangerous. Always use jack stands and follow proper safety procedures when performing any repairs. If you are not comfortable locating and replacing the sensor yourself, take your van to a qualified mechanic.