P1131 Need Some Help
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1
I need some help diagnosing this code, i've checked for major vaccume leaks but i was wondering if my idle was a little high, the truck idles at about 1000-1100 RPMs. i am at the point of replacing the front O2 sensor just to eliminate it that but thought i'd run it past you all to see if i'm on the right track with this.