[Mpaula]

Originally Posted by dpaul

You have a problem - P0171 is bank 1 too lean - you probably have a leak in the intake. Conceivably, this has something to do with your OBDII monitor problem although I can't tell from your description what is actually happening.

But regardless, attend to this P0171 problem, don't just keep driving.

Edit: unless you never cleared the code after the "repair". Just not clear what you did or didn't do and what order you did or didn't do it in.

+1