Computer problem
1997 Chevy Suburban V8 Four Wheel Drive Automatic 107353 miles

Service Engine light came on yesterday and code says bad O2 sensor on right bank. There are 3 O2 sensors on my vehicle according to the auto parts guy and I need to replace all 3 at the same time according to him. Is this correct or can I just replace the one that indicates "bad"?

Thanks,

Flynn

thre thing is if your mechanic said bank 2 sensor 3 or bank 1 or 2 sensor 2 then its probably that sensor some places replace all three just to cya themselves or if they see another problem that might occur in the same area to prevent a come back