2002 V6 SR5 P1135 P0136 P0325 P0330

Hello,
Have this 2002 Tundra with 210,000 and the following codes P1135 P0136 P0325 P0330. I really like this truck but my kids car seats don't fit in the back very well so I mainly drive it on the weekends when I am working on our properties. I am at a loss on where to start. Since this truck can sit for a couple weeks in my detached shop I am worried I have some rodents chewing on wires. It seems to run fine. Can anyone tell me if there is a location where these wires are bundled together? I did replace this O2 sensor with a Denso but the code persists. I really appreciate any help you can give me.

 

Look up the codes, find the location of the sensors that are malfunctioning and start following the wires back. With that many miles tho, it's possible those sensors are just dead and need to be replaced.

 

Were those the codes before or after changing O2 sensor ?
Just to be sure, which sensor did you change....physical location on veh ?
Have you reset the codes and what method was used ?