Hey guys iv got a prob with my '00 GS-R. The other day my maintenace light came on. The code im geting is "System to lean (bank 1)" and "Fuel Trim Malfunction (Bank 1). I have only had the car for 2 months and the first 2 times i filled it i was getting 27mpg but ever since i get 20 to 21mpg and im not beating on it (i fill up 3 times a week). iv put 2 bottles of lucaus fuel treatment in it. It dosent seam like it should be running lean.
Im not sure what to do Please help.