# 2009 Toyota Camry - AC causes rough idle **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** toyota\ **Created:** [June 24, 2020, 2:25pm UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281 "2020-06-24T14:25:58Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![dandjloce](https://avatars.discourse-cdn.com/v4/letter/d/ecd19e/32.png) [@dandjloce](https://community.cartalk.com/u/dandjloce)\ **Post date:** [June 24, 2020, 2:25pm UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/1 "2020-06-24T14:25:58Z")
when first turning on ac it idles rough for about 5seconds. Only notice it when car is in park. Never stalls out. ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [June 24, 2020, 5:43pm UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/2 "2020-06-24T17:43:07Z")
If the belt that drives the compressor is loose, it can vibrate a lot when first under load. There may also be a problem with the compressor or its clutch that means there’s too much resistance to turning when it first starts. ---
**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\ **Post date:** [June 24, 2020, 9:25pm UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/3 "2020-06-24T21:25:50Z")
The engine is supposed to compensate for the additional load of the AC compressor but it sounds like yours isn’t. Try cleaning the throttle body and see if that helps. A faulty idle air control valve could also be responsible. ---
**Author:** ![tom418](https://avatars.discourse-cdn.com/v4/letter/t/da6949/32.png) [@tom418](https://community.cartalk.com/u/tom418)\ **Post date:** [June 25, 2020, 12:32am UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/4 "2020-06-25T00:32:13Z")
For years (like 30) i drove my Toyota Celica without the idle-up vacuum switching valve (speeds up engine with A/C on). At the time, I ordered my car with A/C. When it arrived at the dealer to pick it up, they were installing the A/C unit in the parking lot. Car came off the boat from Japan sans A/C. The A/C came in a kit, from Toyota. The techs simply forgot or neglected to install the vacuum valve. When I got into maintaining cars, I had looked for the valve, but no longer made. I took a chance and got one from a 1984 Tacoma. Even the electrical connector fit. Engine speeds up with A/C on now. There was also supposed to be an “undertray” as Toyota calls it, below the glove compartment. Missing. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [June 25, 2020, 1:37am UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/5 "2020-06-25T01:37:40Z")
> [@davepsinbox\_157004](#): > > A faulty idle air control valve could also be responsible. This car is newer than that . . . it has an electronic throttle body ---
**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\ **Post date:** [June 25, 2020, 1:43am UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/6 "2020-06-25T01:43:22Z")
> [@db4690](#): > > This car is newer than that . . . it has an electronic throttle body It appears to have both an idle air control valve and a throttle body: [Cleaning 2009 Camry Gen 6 Throttle body and IAC valve | Toyota Nation Forum](https://www.toyotanation.com/threads/cleaning-2009-camry-gen-6-throttle-body-and-iac-valve.1186649/) ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [June 25, 2020, 1:52am UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/7 "2020-06-25T01:52:36Z")
A 2009 Camry doesn’t have an idle air control valve If you want to prove me wrong, post a picture of an idle air control valve for a 2009 Camry I’ll give you a gold star for the day if you do so 😃 I read a little bit of that discussion in the link . . . and those guys also state a 2009 Camry has an electronic throttle body without an iac ---
**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\ **Post date:** [June 25, 2020, 2:23am UTC](https://community.cartalk.com/t/2009-toyota-camry-ac-causes-rough-idle/166281/8 "2020-06-25T02:23:06Z")
Well, rats. I can post a picture of an idle control valve for a 2005. Does that count? 😄 I know a faulty IAC valve can cause the problems the OP is having and when I saw the ToyotaNation reference to cleaning it I figured the car had one. I mean, why clean it otherwise? Thanks on behalf of the OP for setting us both straight.