Nissan micra po171 P0171 - Fuel Trim System Too lean (Bank 1 - Micra Dec 24, 2010 · P0171 - Fuel Trim System Too lean (Bank 1) The Micra Sports Club (MSC) was formed in 2001 and we are the only Nissan Micra (and... Source Source Source Source Read Also: Nissan almera po171 P1171 code nissan P0171 nissan 2001 Nissan maxima po171 Nissan almera running lean Engine code p0171 nissan