Check engine light - P0057 (1 Viewer)

[goldgxl]

I've got a 2003 Landcruiser GXL V8. For a week now I have had the check engine light on. I had a local workshop plug in a reader. The code that came up was P0057. They told me it was a fault with one of the O2 sensors.

Do any of you guys know what this fault code is and how to fix it? If it is an O2 sensor, which of the 4 is it?

 

[goldgxl]

Just to complete this thread, I had to replace the right rear O2 sensor to clear the CEL.