# Humming sound from Toyota 2007 Camry

**URL:** <https://community.cartalk.com/t/humming-sound-from-toyota-2007-camry/86702>\
**Category:** Maintenance/Repairs\
**Tags:** noises\
**Created:** [August 19, 2014, 4:00am UTC](https://community.cartalk.com/t/humming-sound-from-toyota-2007-camry/86702 "2014-08-19T04:00:01Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![HofOblivion](https://avatars.discourse-cdn.com/v4/letter/h/aca169/32.png) [@HofOblivion](https://community.cartalk.com/u/HofOblivion)\
**Post date:** [August 19, 2014, 4:00am UTC](https://community.cartalk.com/t/humming-sound-from-toyota-2007-camry/86702/1 "2014-08-19T04:00:01Z")

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I have 2007 Camry that makes a humming noise when A/C and audio are on at the same time. Pitch increases as I press on the gas pedal and decrease to a steady level as I depress on the gas pedal. What could be a cause of this phenomenon?

Thank you in advance.

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**Author:** ![SteveC76](https://avatars.discourse-cdn.com/v4/letter/s/958977/32.png) [@SteveC76](https://community.cartalk.com/u/SteveC76)\
**Post date:** [August 19, 2014, 7:59am UTC](https://community.cartalk.com/t/humming-sound-from-toyota-2007-camry/86702/2 "2014-08-19T07:59:19Z")

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Have you replaced the alternator lately? What you are describing sounds like noise interference. I have seen some of the cheap alternators cause all kinds of strange issues. I would also check your electrical grounds.

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**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [August 19, 2014, 7:30pm UTC](https://community.cartalk.com/t/humming-sound-from-toyota-2007-camry/86702/3 "2014-08-19T19:30:20Z")

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Agree with @SteveC76 and I will add that old spark plugs and cables can also cause this problem. BTW…it only takes one bad plug or cable to cause noise interference.

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**Author:** ![HofOblivion](https://avatars.discourse-cdn.com/v4/letter/h/aca169/32.png) [@HofOblivion](https://community.cartalk.com/u/HofOblivion)\
**Post date:** [August 20, 2014, 8:21am UTC](https://community.cartalk.com/t/humming-sound-from-toyota-2007-camry/86702/4 "2014-08-20T08:21:49Z")

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Those are all good starting point. Thank you @SteveC76‌ and @missileman‌ for awesome suggestions.

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**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\
**Post date:** [August 21, 2014, 12:25am UTC](https://community.cartalk.com/t/humming-sound-from-toyota-2007-camry/86702/5 "2014-08-21T00:25:43Z")

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Alternator or coil on plug. Grounds great idea too.