# Evap leak fixes?

**URL:** <https://community.cartalk.com/t/evap-leak-fixes/87012>\
**Category:** Maintenance/Repairs\
**Created:** [September 5, 2014, 5:36am UTC](https://community.cartalk.com/t/evap-leak-fixes/87012 "2014-09-05T05:36:47Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Zrafferty](https://avatars.discourse-cdn.com/v4/letter/z/e9bcb4/32.png) [@Zrafferty](https://community.cartalk.com/u/Zrafferty)\
**Post date:** [September 5, 2014, 5:36am UTC](https://community.cartalk.com/t/evap-leak-fixes/87012/1 "2014-09-05T05:36:47Z")

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I recently brought my 01 Mitsubishi galant es into autozone for a diagnostic. The error was a evap large leak. What will cause this error. Check engine light comes and goes while driving. I checked my gas cap it is loose so im gonna attempt to get another one. I have tried playing with it but light will not go off.what else should I look into.

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**Author:** ![Zrafferty](https://avatars.discourse-cdn.com/v4/letter/z/e9bcb4/32.png) [@Zrafferty](https://community.cartalk.com/u/Zrafferty)\
**Post date:** [September 5, 2014, 5:37am UTC](https://community.cartalk.com/t/evap-leak-fixes/87012/2 "2014-09-05T05:37:43Z")

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Error code was P0455

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**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:** [September 5, 2014, 5:45am UTC](https://community.cartalk.com/t/evap-leak-fixes/87012/3 "2014-09-05T05:45:28Z")

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Assuming the loose gas cap was the cause of P0455, the light will eventually turn off on its own

Perhaps in a few days

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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:** [September 5, 2014, 5:52am UTC](https://community.cartalk.com/t/evap-leak-fixes/87012/4 "2014-09-05T05:52:33Z")

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A loose gas cap can cause that code.

I’ve had vehicles come in with that code. And when I went to check the gas cap, it wasn’t there.

Tester

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**Author:** ![jesmed1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jesmed1/32/2097_2.png) [@jesmed1](https://community.cartalk.com/u/jesmed1)\
**Post date:** [September 5, 2014, 6:01am UTC](https://community.cartalk.com/t/evap-leak-fixes/87012/5 "2014-09-05T06:01:25Z")

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If a new gas cap doesn’t fix it, have the system smoke tested to pinpoint the leak.

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**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\
**Post date:** [September 6, 2014, 12:52am UTC](https://community.cartalk.com/t/evap-leak-fixes/87012/6 "2014-09-06T00:52:05Z")

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It takes at least three drive cycles for the light to go off.