C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

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Old Jan 15, 2018 | 01:11 PM
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2012 C300
P0496

I have a 2012 C300 and the check engine light comes on every few days. My code reader says p0496, evaporative emission system high purge flow. Any ideas what could be causing it?
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Old Jan 15, 2018 | 01:19 PM
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2012 C300
I have checked and rechecked the gas cap and the code comes back. I did find one thread for this code and all of the folks who replaced their gas cap had the code return so looking for other solutions
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Old Jan 29, 2018 | 09:34 AM
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I pulled the evap purge valve out and tested it with a hand vacuum pump. At first, when I applied 25 bar of vacuum, it would hold but when I applied 15-17 bar of vacuum (which is what the engine vacuuum would be), it dropped to zero in about 10 seconds. So ordered a new valve from eEuroparts and will report back once it is installed.
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Old Feb 4, 2018 | 09:49 AM
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I installed the new purge valve yesterday and will now give it a week of drive cycles to see if the problem is cured. Will report back.
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Old Mar 29, 2018 | 11:41 PM
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The purge valve did it. Problem solved
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Old Mar 29, 2018 | 11:41 PM
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<div style="text-align:left;">The purge valve did it. Problem solved</div>
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