P0171 KIA - AFTER O2 SENSOR CHANGE

Question

I replaced both o2 sensors and cleaned maf sensor and installed new pcv valve. I installed new fuel filter. ck. engine light still comes on about 50 or 60 miles later. Is it my fuel injectors?

Answer 1

Hi there,

This condition could still be a problem with the mass air flow sensor, low fuel pump pressure, any intake leak or exhaust leak as well. IT would be rare for the fuel injectors to cause the issue.