04 crown vic p71 4.6 engine P0171 P0174 P0455

Question

i have a 04 crown vic p71 need to know what po171,po174,po455 codes are

Answer 1

P0171 Fuel trim lean bank1

P0174 Fuel trim lean bank 2

P0455 Evaporative emission control system leak detected (gross leak)

When a lean code appears , you have more air than fuel, look for vacuum hoses that are broken or disconnected, You may even be able to hear a vacuum leak