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P0455 Diagnostic Trouble Code Discussion for May 2005

EVAP System Large Leak

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Trouble Ticket Help Requests for DTC P0455
Help Request Posted
2002 Jeep Liberty Limited 3.7L MIL Lamp on VIN: 1J8GK58K52
P0455: EVAP System Large Leak (0.080") Detected. Vehicle came in with "Service engine" Icon on about three months ago with code stored for small EVAP leak (code 442, I beleive). We suspected fuel cap installation problem, cleared code, advised customer of fuel cap installation, and returned vehicle t...
May 11, 2005
1998 Ford Expedition Eddie Bauer 5.4L MIL Lamp on VIN: 1FMPU18L7W
P0455: evap gross leak. ... with a P0455. At that time I located and replaced a faulty vapor management valve. It was fine for 2300 miles, then last week the light came back on with a P0455 again. I tested it with a smoke machine and it holds pressure, no leaks detected, and the FTP ...
May 17, 2005