1998 ford taurus engine split sport 2000 p0171 p0172

Question

were I can find the fuel and air metering in my car,i have the code machine and read P0171 system too lean[bank 1] Generic I look every were to see how look like but I can't find it..

Answer 1

P0171 Fuel trim lean Bank1

P0172 Fuel trim too rich Bank 2

Fuel system too lean this is a condition where the 02 sensor maintains fuel control. Lean fuel system are caused when the air to fuel ratio is out of balance. This what they reffer to as a lean misfire. This condition can be cause by low fuel pressure, and also a MAF (Mass airflow) sensor not properly reporting , there is also vacuum leaks which when gets past the MAF are called false air and can lean out the system.