P0051 Lexus - picture where sensor it is located

Question

picture of where to replace sensor-code p0051 for 2004 Lexus es330

Answer 1

P0051 Oxygen (A / F ) sensor heater control circuit low (Bank 2 Sensor 1)

Bank 2 is located where cylinder 2 is located at, Being sensor 1 this is the upstream 02 sensor. P0051 mean the A/F or commonly reffered to as the 02 sensor is unable to accurately control air-fuel ratio.

 Bank 2 is where cylinder is located, Sensor 1 is the upstream 02 sensor ( A/F) .