# Replacement of MAF

**URL:** <https://community.cartalk.com/t/replacement-of-maf/5826>\
**Category:** Maintenance/Repairs\
**Created:** [October 11, 2007, 8:46pm UTC](https://community.cartalk.com/t/replacement-of-maf/5826 "2007-10-11T20:46:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mj\_wald](https://avatars.discourse-cdn.com/v4/letter/m/e95f7d/32.png) [@mj\_wald](https://community.cartalk.com/u/mj_wald)\
**Post date:** [October 11, 2007, 8:46pm UTC](https://community.cartalk.com/t/replacement-of-maf/5826/1 "2007-10-11T20:46:51Z")

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I have a check engine light on for my 2002 Ford Windstar. Auto Zone said the two codes that the computer is giving out (0171 and 0174) say I need to replace my MAF. However with the exception of the light being on I have no indication that anything is wrong. No hesitation, I have good power and acceleration. The van has 115K miles. Any suggestions?

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**Author:** ![jabjtom](https://avatars.discourse-cdn.com/v4/letter/j/43a26b/32.png) [@jabjtom](https://community.cartalk.com/u/jabjtom)\
**Post date:** [October 11, 2007, 9:09pm UTC](https://community.cartalk.com/t/replacement-of-maf/5826/2 "2007-10-11T21:09:33Z")

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I had the same codes on my 97 Crown Vic. Try cleaning the sensor wires on your maf with contact cleaner. Did the trick for me. Good luck.

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [October 12, 2007, 3:06pm UTC](https://community.cartalk.com/t/replacement-of-maf/5826/3 "2007-10-12T15:06:24Z")

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Those codes mean that both sides of the engine are too lean. Some of the possible causes (as stated by Auto Tap, scan tool company): dirty MAF; low fuel pressure (could be caused by a dirty fuel filter); vacuum leak ( a gap somewhere, or a disconnected/ cracked vacuum hose, a pcv valve, excessively open egr valve). Do a vacuum check on the engine. You’re looking for a vacuum of 17 to 21 inches hg (normal). Check fuel pressure AFTER changing the fuel filter and air filter. Pour a bottle of Techron Fuel Injector Cleaner into the gas tank.