Bank 1 Sensor 1 is on the rear of the engine near the firewall on the rear manifold.
Note that there are three sensors, Bank 1 Sensor 1, Bank 2 Sensor 1, and Bank 1 Sensor 2. There is only one "Sensor 2", that is Bank 1 Sensor 2 and it is under the car by the catalytic converter. There are two "Sensor 1's", one on the front manifold and one on the back manifold. The Bank 2 Sensor 1 is easy to see from above - you open the hood, look at the front manifold, and there it is! However Bank 1 Sensor 1 is a royal pain. I can only see it in my 2000 Sienna from beneath, and though you can see it, it takes skinny arms, long reach, and some effort to get a wrench on it. If it pops free, then it is relatively straight forward to remove it. However if it is stuck (as often happens since they get carbon build-up on the threads inside the manifold) they are a god-awful pain to get out.
Good luck!
bank 1 sensor 1 2002 on toyots sienna
Bank 2 is the side of the engine that faces the front of the vehicle, sensor 1 is the upper sensor, it is in the exhaust manifold
its is located downstream on the backside exhaust manifold
Bank 2 sensor 1 is the O2 sensor in the exhaust manifold closest to the firewall.Cut and paste the link below for a detailed fix with pics of the O2 sensor repair."http://polifrogblog.blogspot.com/2009/11/sienna-o2-sensor-change.html"
Trouble code P0150 means:O2 sensor circuit malfunction (Bank 2 Sensor 1)
Trouble code P0153 means:O2 sensor circuit slow response (Bank 2 Sensor 1)
Trouble code P0153 means:O2 sensor circuit slow response (Bank 2 Sensor 1)
Bank 2 is the sensor opposite from the number one cylinder, and on your vehicle is the front of the engine. Sensor 1 is the first oxygen sensor you come to from the engine in the exhaust pipe.
Code P1130 Means air/fuel sensor circuit range/performance (bank 1 sensor 1)
its not a sensor you timing belt jumped a tooth on the camshaft sprocket on the rear of the motor...the Bank 1 camshaft...which is the one that sucks to get to
Trouble code P0325 means: Knock Sensor 1 Circuit (Bank 1) Trouble code P0330 means: Knock Sensor 2 Circuit (Bank 2) Need to replace Knock sensor
On the cylinder bank nearest the firewall, the one that is closest to the transmission.