PO325 knock sensor, PO138 and PO139 codes setting all at the same time. The PO138 and PO139 relate directly to a bad downstream O2 in bank #1. The PO325 suggests that the knock sensor may be bad. Should I replace the rear O2 in bank #1 first or the replace the...

FIX posted 5/6/2010

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle