Did some research and came across this for these codes. Smfh I don't even know where to start. I'm thinking O2 sensors or fuel injectors. I'm getting 12.2 mpg.
Oxygen (O2) or A/F ratio sensor or sensor heater malfunction Open or short in O2 sensor circuit (wiring, harness) Fuel pressure or fuel injector problem Faulty PCM Intake air or engine vacuum leaks Faulty fuel injector(s) Fuel pressure too high or too low PCV system leak/fault A/F sensor relay faulty MAF sensor malfunction ECT sensor malfunction Air intake restriction Fuel pressure too high Fuel pressure sensor malfunction Fuel pressure regulator malfunction Note on some vehicles that have been modified this code may be caused by the modifications (e.g. aftermarket exhaust, headers, etc.).