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P0455 Diagnostic Trouble Code Discussion for September 2011

EVAP System Large Leak

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Trouble Ticket Help Requests for DTC P0455
Help Request Posted
2003 Mercedes-Benz G500 5.0L MIL Lamp on VIN: WDCYR49E63
Car came in for CEL on with a P0455, Major leak in purge system. I've smoked the system every which way and cannot find any leaks. Purge valves works, and holds vacuum. The tank vent valve seems to work and seals the system when commanded with the scan tool...
September 12, 2011