It is rich or lean bank 1 or 2 i am not sure which one it is but i know it is rich or lean code they have the same codes as Ford.
Trouble code P0171 means: Bank 1 Combustion Too Lean
Trouble code P0171 means:System too lean (Bank 1)
Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)
Trouble code P0171 means: System too lean (Bank 1)
Trouble code P0171 means:System too lean (Bank 1)
Trouble code P0171 means: System Too Lean (Bank 1)
Trouble code P0171 means:System too lean (Bank 1)
Trouble code P0171 means:System too lean (Bank 1)
Trouble code P0171 means:System too lean (Bank 1)
Trouble code P0171 means: Fuel System Lean (Bank 1)
Trouble code P0171 means:System too lean (Bank 1)
P0171 is System Too Lean (Bank 1), which means that the oxygen sensor detected an excessively lean air fuel mixture.