The code I get on check engine for 1998 Lexus es300 is P0171

the po171 takes two trip cycles to set , it is a lean condition , vacuum leaks,injector restriction , fuel filter, temp sensor the one for the comp. not the dash, mass air flow sensor, the heated o2 sensor for that bank, i doubt the injector cleaner would fix anything. okay because its only 1 bank we can rule out fuel filter,mass air,temp sensor. i would look for vacuum leak , o2 ,injector things just related to bank one. if i had to guess with out running proper test i would go after bank 1 sensor 1 o2