Toyota Repair: 2001 Sienna P1130 and P1135 codes, p1130, dtcs

Question
I've seen several people have this issue here and the response is to either
1) change the battery (is this valid?  can it be this simple?
2) Change the A/F ratio sensor (Bank 1 Sensor 1)

Here it mentions Bank 1 Sesor 1 being on the back, firewall side and requiring a special tool to replace (what kind of tool)?

This seems to be different depending on year and size engine.  Is this correct?

I called the parts department and they mentioned two different parts.  89467-41030 and 89467-41040.  They said P1130 refers to 89467-41040 and is located in the front, which contradicts what I have been reading.  I'm assuming is due to being a 2001 and not a 2000 sienna.

Thanks for you help!  I don't want to get the wrong sensor if it can be avoided.

Thanks!
Jeff

Answer
These DTCs indicate a malfunction with the AF/R sensor Bank One/Sensor One, (B1/S1)it is located near the firewall in the exhaust manifold, I don't deal with part numbers,all I can tell you is which sensor is malfunctioning according to the information you have given me. There is a special tool needed to remove it,(O2 sensor socket). The battery has nothing to do with this.There is no difference in the year model either.