How do you replace air/ fuel sensor on a 2002 prerunner? The code says it is the sensor in Section 1 Bank 1 any help would be great.

 

Guessing keyboard is not your first language. Edited your post so it was understandable. Have you tried googling this? I found the answer with part numbers and a write up on how to fix it in about 2 seconds by googling "2002 4-Runner Air Fuel Ratio Sensor"