What's the 2004 Toyota Sienna bank 1 sensor 1 location?

The 2004 Toyota Sienna bank 1 sensor 1 location is the bank of cylinders that contain cylinder #1 and on Your van that is the rear or closest to the firewall bank of cylinders. The sensor is about the size and shape of a spark plug and protrudes into the car engine's exhauSTStream. It determines if there is a lot or a little oxygen in the exhaust, so the engine can make adjustments to the amount of fuel being used in the engine to run at maximum efficiency. If Your vehicle has a bad oxygen sensor, it could run irregularly or sound rough when it idles.A faulty oxygen sensor can impact Your engine's timing, combustion intervals, and other essential functions. You could also notice stalling or slow acceleration.