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...
Code P0171 on a 1997 Ford Contour indicates a lean condition in the engine's air-fuel mixture, meaning the engine is receiving too much air or not enough fuel. This can be caused by issues such as a vacuum leak, a malfunctioning mass airflow sensor, fuel delivery problems, or a clogged fuel filter. Addressing this code typically involves inspecting the intake system for leaks, checking fuel pressure, and ensuring the mass airflow sensor is functioning correctly. Ignoring this code may lead to poor engine performance and reduced fuel efficiency.
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