What's the 2004 Toyota Corolla oxygen sensor bank 1 sensor 1 location?

The 2004 Toyota Corolla oxygen sensor bank 1 sensor 1 can be found on the exhaust manifold as it comes out of Your engine. This one is located before the catalytic converter. The oxygen sensors in Your car are used to measure the air to fuELRatio of the exhaust as it exits Your engine. This can help make sure that Your engine is running properly and it will let the ECU know if it needs to add more air, fuel, or adjust timing. When You have an oxygen sensor failing You will usually get a check engine light on at the dash. When one is failing usually You will also notice that Your vehicle is not running well and may not be able to idle properly.