Hey guys.....just a quick question. I've seen a lot of posts for check engine error codes P0171 & P0174 but I keep getting a P0172(bank 1 too rich). I clear out the code with my scanner which by the way has already paid for itself. The O2 sensors check out with the scanner and the code comes on about once a week...oh yeah still have the engine stumble at idle when coming to a stop. Anyone with similiar problems...suggestions? Thanks...

 

Does your scanner let you look at the o2 sensor voltages while the truck is running? Or is it one of the testers that gives you a green light if it's good, red light if it's bad? Reason being, the sensor could be operating in a normal range but could be moving kind of sluggish, you would be able to see this by comparing the voltages of the sensors.

Just an idea
-Jon