Replace the shocks and struts! :-D
Code P0171 means System to lean (bank 1)
If you are getting a Lean code then it is probably being caused by the intake plennum gaskets. This is a common problem on the Windstar. The fix is relatively easy.
Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean
Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)
Ford Motor
mass airflow sensor mine did the same thing and that's what fixed it for me...
Had the same problem - could be either the gas tank cap is not tight, and not sealing airtight, or it could be a bad oxygen sensor in the engine, causing the air/fuel mixture to be off. Went through this with my '98 too. I had the O2 sensors replaced to pass emissions and it came back on.. I probably have a problem with my intake valve, running too lean and tripping that sensor.
you need to change your plugs of change your plug wires reguarding bank 1 lean fuel mixture you will have to change your 02sencer
There is a known problem with the 3.8 engines in 1999-2003 Windstars.See "Related Questions" belowAnswerI was just told today that my 2000 Ford Windstar is running lean, too. He said it's most likely a vacuum seal problem so i was told to change my PVC valve and my plenum gasket
No. It was a construction problem and began to lean before it was finished.
No it would indicate maybe a lean mixture in the fuel but no major problems
1999 Ford Taurus. System Adaptive fuel too lean banks 1 and 2. How can I fix these.