P0171 System Too Lean (Bank 1)

[MiguelE5]

First time in a forum. Can anyone help trouble-shoot this error? Where do I begin? Your help is appreciated.

[yovinman]

first off how does it run and how many miles are on it

[MiguelE5]

The van runs well. It has just over 68,000 miles.

[yovinman]

p0171 indicates a o2 sensor fault code if engine runs well it is probibly in the o2 sensor, just replace the o2 sensor and clear code they say they last about 70,000 miles

[mark v]

Always replace the sensors in pairs when they have lots of miles on them. The Windstar has 2 O2 sensors.

[MiguelE5]

O2 Sensors. Got it. I'll let you all know how it went after I replace them both. Thanks for the quick response.

[firstwindstar02]

You could just test them prior to shelling out the money and have the possibility of throwing out good sensors.

[catvents]

Originally Posted by MiguelE5

First time in a forum. Can anyone help trouble-shoot this error? Where do I begin? Your help is appreciated.

P0171 and P0174 ( you will probably have this code soon being related to the same problem) is not related with the O Sensor but with the intake Isolator bolts, common issue on the 1999 to 2003 models 3.8. Take a look on the following link: 2000 Ford Windstar (Codes 171 and 174)

[mark v]

And how do you go about doing this?

Originally Posted by firstwindstar02

You could just test them prior to shelling out the money and have the possibility of throwing out good sensors.

[firstwindstar02]

Originally Posted by mark v

And how do you go about doing this?

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