# 2003Windstar, PO 171 PO 174, New MAFSensor?

**URL:** <https://community.cartalk.com/t/2003windstar-po-171-po-174-new-mafsensor/58063>\
**Category:** Maintenance/Repairs\
**Created:** [November 28, 2010, 10:45pm UTC](https://community.cartalk.com/t/2003windstar-po-171-po-174-new-mafsensor/58063 "2010-11-28T22:45:30Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\
**Post date:** [November 28, 2010, 10:45pm UTC](https://community.cartalk.com/t/2003windstar-po-171-po-174-new-mafsensor/58063/1 "2010-11-28T22:45:30Z")

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Running lean bank 1 and bank 2.

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**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\
**Post date:** [November 28, 2010, 10:46pm UTC](https://community.cartalk.com/t/2003windstar-po-171-po-174-new-mafsensor/58063/2 "2010-11-28T22:46:25Z")

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Duh, 2003, 55k miles, 6cyl engine.

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [November 28, 2010, 10:47pm UTC](https://community.cartalk.com/t/2003windstar-po-171-po-174-new-mafsensor/58063/3 "2010-11-28T22:47:37Z")

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Clean MAF  
Check vacuum/intake leaks  
Check fuel pressure

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**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\
**Post date:** [November 28, 2010, 11:32pm UTC](https://community.cartalk.com/t/2003windstar-po-171-po-174-new-mafsensor/58063/4 "2010-11-28T23:32:36Z")

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Thanks, Looked on the web, for a how to, the guy had MAF cleaner, guess I’ll buy some unless something in my arsenal will suffice, will check vacuum and fuel pressure also. No issues but the light so far.

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**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [November 29, 2010, 2:30pm UTC](https://community.cartalk.com/t/2003windstar-po-171-po-174-new-mafsensor/58063/5 "2010-11-29T14:30:21Z")

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Both engines for this model were v6. One a 3.8 liter, and the other 3.0. I’m assuming you have the 3.8. Most common cause for these codes is leaking upper intake. Leaks when cold and seals when warm. To actually diagnose this one you will need a scanner so you can watch fuel trims.