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P0455 Diagnostic Trouble Code Discussion for November 2010

EVAP System Large Leak

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Trouble Ticket Help Requests for DTC P0455
Help Request Posted
2007 Chevrolet Tahoe LT 5.3L MIL Lamp on VIN: 1GNFC13097
P0455: EVAP System Large Leak Detected. This sad tale begins as many evap. stories seem to with repeated trips to the dealer with no resolution.Apparently service bulletin 09-06-04-028 did not yield the desired results.This unit belongs to a family member , who at this point is not going back to the...
November 04, 2010
1997 BMW 318i 1.9L MIL Lamp on VIN: WBACC0323V
P0455: Evap gross leak/ noflow. This BMW keeps resetting code P0455. Have "bench tested" purge valve several times, allways holds vacuum and releases vacuum when energized with power probe. I'm unable to activate any valves with scan tool. Installed new canister with new closed valve...
November 10, 2010
2002 Audi Allroad Quattro 2.7L MIL Lamp on VIN: WA1YD64B32
P0455: Large leak. I am not an Audi tech, but got stuck with this thing. The car came in with mil light on and evap faults. We have a ross-tech software and I am trying to run the group test 071 evap test. I am getting reed open message and it won't go to reed closed. I need to ...
November 11, 2010