So I went out to Sears last night and bought a scanner. I got a little carried away and bought a $179 ODB II scanner that can scan for codes, do a live scan, and reset the computer. When I got home, I ran the scanner and codes P0174 and P0171 came up (in that exact order). These codes tell me that Banks 2 and 1, respectively, are running lean. I already had an appointment set up with the mechanic today so I figured I would bring the truck in and have him tell me what specifically was causing these two codes. However, this morning I started my truck and suddenly the Check Engine Light light was off (and I did NOT clear the codes/computer when I had the scanner hooked up last night). I can tell you with 100% certainty that the light originally came on a week ago during very cold temps here in the Northeast (it was only 15 degrees that morning). For the past two days, we have been experiencing above average temps (60 degrees), so I think the light came on because of the cold weather. But why??? It never did this any previous year.
