On a 2000 Toyota Avalon, Bank 1 Sensor 1 (O2 sensor) is located on the exhaust manifold on the driver's side of the engine. It is positioned before the catalytic converter and is responsible for monitoring the oxygen levels in the exhaust gases. To access it, you may need to lift the vehicle and work from underneath or reach it from the top of the engine compartment. Make sure to disconnect the battery before attempting any repairs.
bank 1,sensor 1 oxygen senor by exhaust manifold
bank one is close to the fire wall sensor one is before the cat
bank 1 is the one closest to the firewall. sensor 1 is the first one exhaust gasses will come in contact with after leaving the cylinder head.
Trouble code P0171 means:System too lean (Bank 1)
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
Follow this link to Toyota Technical Service Buliletin for your answer. http://www.toyotapart.com/ENGINE_BANK_1_AND_BANK_2_A_F_AND_02_IDENTIFICATION_T-EG034-07.pdf
Follow this link to Toyota Technical Service Buliletin for your answer. http://www.toyotapart.com/ENGINE_BANK_1_AND_BANK_2_A_F_AND_02_IDENTIFICATION_T-EG034-07.pdf
Drivers side after cat.
on cylinder 1 side mounted on the manifold
bank 1 sensor 1 2002 on toyots sienna
remove intake assy and its inside the engine block,you can see once you remove the intake.its bank 1 aND BANK 2
The oil control valves (OCV) are located between the cylinders on the drivers side. Bank 1 OCV is below the throttle body. Bank 2 is above the starter.