# 2005 Hyundai Sonata - Code 456

**URL:** <https://community.cartalk.com/t/2005-hyundai-sonata-code-456/186247>\
**Category:** Maintenance/Repairs\
**Tags:** hyundai\
**Created:** [September 6, 2022, 10:46pm UTC](https://community.cartalk.com/t/2005-hyundai-sonata-code-456/186247 "2022-09-06T22:46:23Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![FuadGarabet](https://avatars.discourse-cdn.com/v4/letter/f/0ea827/32.png) [@FuadGarabet](https://community.cartalk.com/u/FuadGarabet)\
**Post date:** [September 6, 2022, 10:46pm UTC](https://community.cartalk.com/t/2005-hyundai-sonata-code-456/186247/1 "2022-09-06T22:46:23Z")

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engine light On, code po456

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [September 6, 2022, 10:50pm UTC](https://community.cartalk.com/t/2005-hyundai-sonata-code-456/186247/2 "2022-09-06T22:50:12Z")

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OK , you have a code that might mean you have an emissions problem . So what do you plan to do about it ?

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**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\
**Post date:** [September 6, 2022, 10:54pm UTC](https://community.cartalk.com/t/2005-hyundai-sonata-code-456/186247/3 "2022-09-06T22:54:51Z")

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I would check your fuel cap first.

[Hyundai Sonata P0456: EVAP System – Small Leak | Drivetrain Resource (700r4transmissionhq.com)](https://www.700r4transmissionhq.com/p0456-hyundai-sonata/)

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [September 7, 2022, 3:59am UTC](https://community.cartalk.com/t/2005-hyundai-sonata-code-456/186247/4 "2022-09-07T03:59:23Z")

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> [@VOLVO-V70](#):
>
> So what do you plan to do about it ?

Diagnose and repair the leak, thanks to your detailed guidance on evaporative emission repairs.