Alright guys and gals, It may be time for a new 02 sensor. The OBDII reader is saying that I have a bad one in Bank 1. I looked under my truck a few minutes ago and saw 2 o2 sensors. Is bank 1 the one at the front? It logically makes sense, but you never know...at least I don't. Both the ones I saw were on the passengers side. I tried resetting it a couple times but the damn check engine light is coming on again. Though this time it came on when I went to the store, then was off when I left to go home. Anywho, I think I'll change it, any help is much appreciated!

 

Pretty sure bank 1 sensor 1 is mounted driverside just below the header, and Bank 2 sensor 1 is pass front(below header), bank 2 sensor 2 is after the cats. 3 total.

 

^^^ I agree