BMW 750il 1997 - How to Fix OBD2 Code P1166 and Pass Smog Inspection

Model: 1997 BMW 750il Fault Code: P1166 Posted: 2008-01-10 10:13

I'm currently receiving OBD2 diagnostic code P1166 on my 1997 BMW 750il. This code indicates a malfunction in the oxygen sensor for bank 1, sensor 2 (post-catalyst). I cannot pass smog inspection until this issue is resolved. Anyone with experience troubleshooting this specific code on a 1997 BMW 750il? What are the common causes and solutions?