P0171 Chevrolet -what should i change on this code?

Question

It is blowing 5 codes 2-P0171, 2-P0174 and 1-P0131

Answer 1

P0171 Fuel trim lean Bank 1

P0174 Fuel trim lean Bank 2

P0131 02 sensor circuit low voltage (Bank 1 Sensor 1)

Some of the causes for fuel trim to be lean are, low fuel pressure , The most common cause are vacuum leaks which is unmeter air that gets past the MAF (mass airflow) , or MAF that fails to accurately report the amount of air entering into the intake system. First do a inspection look and listen for any vacuum leaks, at is vacuum hoses especially at the brake booster,where the brake master cyclinder sits. you can use carburator cleaner or brake cleaner and spray around the area listening for any engine RPM changes.