My engine service light came on and I took it to autozone to get a scan of the problem. They said it was Bank 1 sensor 2, which told me that it was the one right before the Catalytic convertor on passenger side. Well is it up front or the rear one on the passenger side? I changed the first one and the code went off for about 5 miles and then came back on. I don't have any cats and have the MILs on the rear. So my questions is, is it the front sensors or rear sensor? Help please.
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2003 Ford Mustang GT Question: Help with 02 sensors diagram
sinautoscan.com October 28, 2009, 12:11Master
if you have no cats your light will always be on, i suggest you get some cats before replacing any of your sensors.
Answer #2Bret Bodas from RepairPal Test Shop, October 28, 2009, 15:05Master
Bank 1 refers to the side that #1 cylinder is on, Bank 2 is the other side. Sensor #1 is before the Catalytic Converter, Sensor #2 is after the Cat.