Check engine light came on. (84,500 miles on the 2001 V6) I had Autozone test it. Says O2 sensor is failing. But he mumbled about it being the "second bank" sensor. I never clearly understood what he was trying to explain, I think the readout on the testor said "PO128."
Any idea what that means? Are both sensors the same? How hard is it to crawl under there and replace?
Thanks!