Location for heated oxygen sensor bank 1 2002 Chevy venture?

The heated oxygen sensor (HO2S) for bank 1 on a 2002 Chevy Venture is located in the exhaust manifold or the exhaust pipe very close to the exhaust manifold, on the passenger side of the engine. Bank 1 always refers to the side of the engine where cylinder #1 is located.

Because there are variations depending on the specific engine (3.1L or 3.4L), it's difficult to be more precise without the exact engine code. A repair manual specific to your vehicle's year, make, model, and engine is highly recommended for precise location and removal/replacement instructions. You can usually find these online or at an auto parts store. A visual inspection under the vehicle (carefully!) is also recommended once you have a general idea of the location. Be aware that the exhaust system will be hot, even after the engine has been off for a while.