This means that you o2 sensor is sensing a lean fuel mixture (rich gas) so to correct this problem start by changing your o2 sensors, checking you spark plugs to see if they have white tips, replacing your pvc and cleaning your air intake with carb cleaner (if it is stock)
Fuel system lean bank number 2Fuel system lean bank number 2
Trouble code P0171 means: Fuel System Lean (Bank 1)
Trouble code P0171 means: Fuel System Lean (Bank 1)
Bank one fuel system lean. Test fuel pressure, check for vacuum leaks,
Trouble code P0171 means: Fuel System Lean (Bank 1)
Bank #2 fuel system lean.
Fuel injection system fuel trim too lean (Bank 2)
Trouble code P0171 means: Fuel Trim System Lean (Bank 1) Trouble code P0174 means: Fuel Trim System Lean (Bank 2)
PO171 = system adaptive fuel too lean (bank 1) PO174 = system adaptive fuel too lean (bank 2)
Trouble code P0171 means: Fuel Trim System Lean (Bank 1) Trouble code P0174 means: Fuel Trim System Lean (Bank 2)
Trouble code P0171 means: Fuel Trim System Lean (Bank 1) Trouble code P0174 means: Fuel Trim System Lean (Bank 2)
1999 Ford Taurus. System Adaptive fuel too lean banks 1 and 2. How can I fix these.