Hey folks, how's things goin'? I need a little help with a check engine code. The local autozone, here in southern West Virginia, scanned the code. But, the genius didn't know exactly what sensor threw the code. The code is PO132, sensor 1 of 1. I think it's the "upstream" O2 sensor, but not sure. Any help would appreciated. By the way I have a '97 dak with the 3.9L. Thanks in advance everyone.[8D]

 

your truck has two oxygen sensor. 1/1 is before cat. coverter and 2/1 is behind cat. converter