Home >> Lexus >> 2004 >> GX 470 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> SFI System (2UZ-FE) (Diagnostics) >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1); DTC P0174: System Too Lean (Bank 2); DTC P0175: System Too Rich (Bank 2) >> Monitor Strategy