On 2000-2002 Tundra the Bank 1 Sensor 1 is located on the most front left side (your left sitting in the drivers seat). Right next to the rear end of the exhaust manifold, immediately ahead of the flange for the exhaust pip Fault Code PO155 02 Sensor Heater Fault (Bank 1 Sensor 1)
remove intake assy and its inside the engine block,you can see once you remove the intake.its bank 1 aND BANK 2
bank 2 sensor 2 is the passenger side, rear sensor, it is located behide the catalytic converter.
there are 4. here is one of them Bank 2 sensor 1 http://inlinethumb15.webshots.com/4942/2695479270043892667S600x600Q85.jpg
The P0155 refers to the Oxygen sensor on Bank 2, sensor 1. Bank 2 on your vehicle is on the passenger side of the engine. Sensor 1 is the first oxygen sensor in the exhaust pipe coming from the engine.
Bank 1 refers to the location of the bank of cylinders that contain the #1 cylinder. Sensor 2 refers to the Oxygen sensor after the catalytic converter. Bank 1 is the left side of the engine, in this case against the firewall, and Sensor 2 is past the catalytic converter on that bank.
bank one is drivers side, sensor 2 is rear O2 sensor(oxygen sensors are screwed into exhaust pipes)
where is the oxygen sensor location on a 1998 explorer bank 2 sensor
Drivers side after cat.
I've posted several photos of bank 1 sensor 1 & 2 on the mpvclub.com website. Bank 1 sensor 1 is nearly impossible without the right tools.
location right bank knock sensor 2003 5.3 z71
There are 2 catalytic converters on a V8 2002 Toyota Tundra. Bank 1 is the manifold and cat on the drivers side and bank 2 is the manifold and cat on the passenger side. Sensor 1 is the sensor on the exhaust manifold before the catalytic converter. Sensor 2 is the sensor located after the cat converter. Bank 2 Sensor 2 is the sensor located after the catalytic coverter on the passenger side.
drivers side before the converter