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Code P0455 Check engine/fuel cap open

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Old 03-26-2023, 11:25 AM
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2003 G55-wagon AMG
Code P0455 Check engine/fuel cap open
I have done the following:
Change the fuel cap and nothing.
Installed a new Charcoal canister and nothing
Installed purge valve and nothing
It passed the smoke test and the codes come back after a few miles. I checked the fuel neck and no smell or leaks.
Any advice would be helpful.

Thanks

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Old 03-27-2023, 04:33 PM
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2015 SL550, 2017 GLS 550, 2010 G550, 1995 E320 Cabriolet
The same problem happens with my G550. I've found that waiting for the problem to go away is typically the best solution
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