Check Engine Codes: PO171+PO174 System Bank? What do they mean?
I have a 1998 F150 4x4 with the smaller V8 and 209k on it. My check engine light came on, even though my truck still seems to be running well with no problems. I took it to Autozone and they read the codes P0171 (system bank1) and PO174 (System bank2). They said it looked like those codes hit twice and suggested buying some fuel injector cleaner could fix it? So, I bought the $3 STP fuel cleaner (can't hurt right) but I don't think those guys always know what they are talking about, so I thought I'd double check here.... I have no idea what a System Bank even is (I'm not a mechanic). Is this something I should be concerned about? Any suggestions on how I should handle this?
Last edited by mscruton; 05-06-2006 at 12:46 AM.