2004 Chevrolet Blazer Q&A

2004 Chevrolet Blazer Question: po155 code

getting a PO155 code, already chanced oxy sensor, what could it possibly be -
Answer 1
The other O2 sensor?? Which one did you change? The P0155 s for the B2S1 - Bank 2 , the O2 sensor before the catalytic converter. Zee -