My check engine light P0456
Thread Starter
Joined: Sep 2008
Posts: 1
My check engine light P0456
Ok so i have gone through the p0456 threads and needs some specifics. Long story short, don't think its my gas cap, need to know how I check my canister close valve to see if thats the problem. I have an 02 Elantra Gt. Where is it and what do I need to do?? Thanks!!!!
Junior Member
Joined: May 2017
Posts: 2
2004 Sonata 2.4L where is the purge valve
Dear Forum members,
I received a P0456 code. Changed the gas cap and turned the code off. 50 miles later the code came back on. I'm trying to locate the purge valve to inspect. Any suggestions are greatly appreciated.
I received a P0456 code. Changed the gas cap and turned the code off. 50 miles later the code came back on. I'm trying to locate the purge valve to inspect. Any suggestions are greatly appreciated.
Senior Member
Joined: Sep 2015
Posts: 1,419
From: Albany/NY/USA
Sonata .. not sure ... on my Elantra ...
The purge line comes from under the left side and goes to the purge valve
Located between the fire wall and the engine ... near a hose going to the throttle
It is a normally closed valved.
When activated, the valve opens and allows the charcoal canister to purge its load of hydrocarbons.
This is not advice ... only trying to answer your question.
Good luck
The purge line comes from under the left side and goes to the purge valve
Located between the fire wall and the engine ... near a hose going to the throttle
It is a normally closed valved.
When activated, the valve opens and allows the charcoal canister to purge its load of hydrocarbons.
This is not advice ... only trying to answer your question.
Good luck
Last edited by avisitor; Jul 31, 2017 at 10:35 PM.
Junior Member
Joined: Jan 2023
Posts: 1
Help
I have a 2011 sonota limited for the past year and a half I Ben trying to fix this p0456 evap code I replaced everything I did the vent valve the purge valve the gas cap the fuel pump and lock ring the fuel tank pressure sensor and the charcoal vapor canister and I’m still geting this dam evap leak code it’s driving me crazy everytime I get my car back as fixed it never is it was smoke tested 3 different times by 2 different people one was my father no one can find a evap leak anywhere with soap and water no smoke comeing out anywhere I’m stuck why am I still getting this code I replaced the whole fuel system basically and yea I used all oem Hyundai dealer parts all oem Ann lines and hoses look good car runs and drives fine I just can’t seem to get this light to stay off it’s the same code everytime going on 2 years now I have inspection comeing up am I missing something here cause no mechanic can help me anywhere I bring it they can’t find a evap leak anywhere even the Hyundai dealer couldn’t find the problem I’m stuck help anyone am I missing something here
Senior Member
Joined: Sep 2013
Posts: 2,892
Looks like you are chasing a tech's worst nightmare, AN INTERMITTENT .
What may help is if you clear the code and try to pay close attention of the conditions when the light comes on or the code appears.
Sometimes a scan tool with Freeze Frame capability will tell you what the conditions were at the time the code appeared. That way you can repeat the conditions and be assured the problem was corrected.
What may help is if you clear the code and try to pay close attention of the conditions when the light comes on or the code appears.
Sometimes a scan tool with Freeze Frame capability will tell you what the conditions were at the time the code appeared. That way you can repeat the conditions and be assured the problem was corrected.
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