# 2009 Nissan Sentra - Why does it rev?

**URL:** <https://community.cartalk.com/t/2009-nissan-sentra-why-does-it-rev/183284>\
**Category:** Maintenance/Repairs\
**Tags:** nissan\
**Created:** [March 28, 2022, 8:03pm UTC](https://community.cartalk.com/t/2009-nissan-sentra-why-does-it-rev/183284 "2022-03-28T20:03:25Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Burt23](https://avatars.discourse-cdn.com/v4/letter/b/439d5e/32.png) [@Burt23](https://community.cartalk.com/u/Burt23)\
**Post date:** [March 28, 2022, 8:03pm UTC](https://community.cartalk.com/t/2009-nissan-sentra-why-does-it-rev/183284/1 "2022-03-28T20:03:25Z")

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Why does my Nissan Sentra rev when starting?

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**Author:** ![Beancounter](https://avatars.discourse-cdn.com/v4/letter/b/59ef9b/32.png) [@Beancounter](https://community.cartalk.com/u/Beancounter)\
**Post date:** [March 28, 2022, 10:09pm UTC](https://community.cartalk.com/t/2009-nissan-sentra-why-does-it-rev/183284/2 "2022-03-28T22:09:09Z")

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It’s cold and require a nenriched mixture to keep it running which will be corrected as the engine warms up.

Happens in all cars

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**Author:** ![Burt23](https://avatars.discourse-cdn.com/v4/letter/b/439d5e/32.png) [@Burt23](https://community.cartalk.com/u/Burt23)\
**Post date:** [March 28, 2022, 10:27pm UTC](https://community.cartalk.com/t/2009-nissan-sentra-why-does-it-rev/183284/3 "2022-03-28T22:27:11Z")

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He has had it for years. It just started doing it.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [March 28, 2022, 10:30pm UTC](https://community.cartalk.com/t/2009-nissan-sentra-why-does-it-rev/183284/4 "2022-03-28T22:30:06Z")

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A bad engine coolant temp sensor to the computer can cause that.

Tester

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**Author:** ![Burt23](https://avatars.discourse-cdn.com/v4/letter/b/439d5e/32.png) [@Burt23](https://community.cartalk.com/u/Burt23)\
**Post date:** [March 29, 2022, 2:11am UTC](https://community.cartalk.com/t/2009-nissan-sentra-why-does-it-rev/183284/5 "2022-03-29T02:11:41Z")

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Thank you… I will tell him to have it tested.