Hi All, i was hoping some one on here might be to help. I have a Tino on an 05 plate, it has just failed its mot on high emissions (Co excessive). I have a fault code of P0171 system to bank 1 to lean. I have changed the air, pollen, and oil filters, I ran some Cataclean through and some fuel system cleaner. The E M light went of for a good 2 weeks but today its back and my mpg is dropping all the time. Any ideas as to what the fault is?
