P0171 Hyundai Sonota 2007

Question

I just changed the bank 2 sensor 1 oxygen sensor on my car because I had error code P0154. It seemed that everything went well until my engine light came on again the next day. I no longer had the P0154 code, but did have the following codes show up: P0171,P0172,P0174,P0175,P2187,P2188,P2189,P2190. What is going on now. Do I need to replace the bank1 sensor 1 oxygen sensor? Do my fuel injectors need cleaning? New fuel filter? The car mileage is 81,000 miles.

Answer 1

P0171,P0172,P0174,P0175,P2187,P2188,P2189,P2190

all those codes are for bank 1 and bank 2 too lean meaning there is too much air and not enough fuel.

you can check for exhaust leaks. you can also check fuel pressure 

the fuel filter is part of the fuel pump assembly 

It might be related to mass air flow sensor. Try to clean the mass air flow sensor with mass air flow sensor cleaner.