# P0506 Idle Air control system RPM lower than expected

**URL:** <https://community.cartalk.com/t/p0506-idle-air-control-system-rpm-lower-than-expected/49335>\
**Category:** Maintenance/Repairs\
**Tags:** mustang, gt, ford\
**Created:** [May 24, 2010, 10:59pm UTC](https://community.cartalk.com/t/p0506-idle-air-control-system-rpm-lower-than-expected/49335 "2010-05-24T22:59:26Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fawadquazi](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/fawadquazi/32/213_2.png) [@fawadquazi](https://community.cartalk.com/u/fawadquazi)\
**Post date:** [May 24, 2010, 10:59pm UTC](https://community.cartalk.com/t/p0506-idle-air-control-system-rpm-lower-than-expected/49335/1 "2010-05-24T22:59:26Z")

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I had the Check engine light come on today. Code is P0506. Any suggestions.  
  
 I had just removed and reinstalled the battery and I gave the car 20 minutes to re-learn the idle trim with no load.

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**Author:** ![americar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/americar/32/42_2.png) [@americar](https://community.cartalk.com/u/americar)\
**Post date:** [May 24, 2010, 11:29pm UTC](https://community.cartalk.com/t/p0506-idle-air-control-system-rpm-lower-than-expected/49335/2 "2010-05-24T23:29:36Z")

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Removing, and cleaning the IAC with Air intake cleaner may fix the problem,if its full of gunk.

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**Author:** ![fawadquazi](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/fawadquazi/32/213_2.png) [@fawadquazi](https://community.cartalk.com/u/fawadquazi)\
**Post date:** [May 25, 2010, 1:39am UTC](https://community.cartalk.com/t/p0506-idle-air-control-system-rpm-lower-than-expected/49335/3 "2010-05-25T01:39:13Z")

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Where is this IAC. Do you mean to clean out the throttle body. Thanks