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Originally Posted by 88260e
So for awhile now on my 03 W210 wagon I’ve been chasing a large leak code P0455, replaced the canister vent valve, solenoid valve, smoke tested it, OE gas cap, and after market cap, and lastly the pressure sensor in the tank. Only thing left is the charcoal canister itself, but it is unavailable, so I’m at a loss. Anyone run into this issue, or have any suggestions?
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Instead of throwing parts at it, have you had it tested with smoke? Sometimes the purge valve starts to stick - a little WD40 helps it.