please help with engine code on ford Ranger 1995

Question

new fuel pump new fuel pressure regulator.new fuel filter,new tps new idle sensor.new oxegen sensor not the one at catylatic converter.cant find any vacume leaks .please help.with the p1131 and p1151 codes.frustrated

Answer 1

P1131 Lack of H20S switch - indicates lean

P1151 Lack of H20S switch bank 2 sensor 1

Do a MAF (mass airflow) cleaning, this is what Ford recommends when a lean drivability occurs, When the MAF gets contaminated it over estimates airflow at idle and in returns leans the system out, Ford recommends the use of brake cleaner to do the job,

Comments

we tried this already.is there any other options.oxygen sensor?i believe the one by converter was the one that wasnt replaced...