CANP solenoid circuit has a short to ground or an open?  Try tracing
the circuit and find if a connector is dirty.  Also pull your CANP and
see if it holds vacuum, you might have to apply battery voltage to test
it.  No vacuum held replace the CANP, but replacing the solenoid
probably won't fix the circuit failure.  I don't think the CANP failure
will cause the engine to run bad.

Lean exhaust bank 1 could be a vacuum leak, intake manifold leak, weak
fuel pressure.  Basically too much air or not enough fuel, but the
computer is complaining that it can't get bank 1 into closed loop fuel
control mode, this helps your gas mileage by adjusting the fuel flow to
the cylinders based on what the O2 sensor reports.