Where is oxygen sensor 1 bank located on 2003 Chevy venture?

On a 2003 Chevy Venture, Oxygen Sensor 1 (O2S1) Bank 1 is located on the exhaust manifold or exhaust pipe very close to the engine's exhaust port on the passenger side (right side in the US). It's the upstream sensor, meaning it's before the catalytic converter.

However, precise location can vary slightly depending on the engine type. It's best to:

* Consult your vehicle's repair manual: This will provide diagrams and precise instructions.

* Use a repair manual app: Apps like Chilton or AllDataDIY often have detailed diagrams for specific models and years.

* Search online using your specific engine code: Knowing the engine code (often found on a sticker under the hood) will help narrow your search for specific diagrams.

Trying to find pictures online of a 2003 Chevy Venture's engine bay might also help visualize its location. Be cautious when working near hot exhaust components.