Here are the codes that popped. P0171, p1150, p1155, p0125

Talked to service agent at dealership and he said (As well as my internet research found) was an A/F (ox sensor). Got an ox sensor and changed the sensor on bank 1 (as the code 0171 indicated). drove around for a bit and all the codes EXCEPT for the 0171 popped up again.

Any suggestions? the sensor on bank 2 is original for this 2000 rx 300 with 85k on it.

thanks in advance

 

Based on what mine did when my sensor died, I would say you need a new sensor in bank 2. Bank 1 might have been ok. You could pop your old bank 1 sensor in bank 2 and see what happens. It would not be the end of the world to replace them both if you have the $. Ignore the p0125 code, it will go away when the A/F sensor issue is fixed.

 

That's funny, that is exactly what we did last night too. So far i've traveled 30 miles and no codes or lights are popping on. When we popped the first sensor off, it was evident it had been changed before. The second sensor we popped off, was original to the vehicle (we'd assume)

Here's to hopeing!!!