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International Automotive Technicians Network
Re: P0455 vent valve operation
Posted to Technical Discussion Forum on 8/16/2010

The car is fixed (I think) I did find that the cas cap would not allow more than -1.34 vacuum. I replaced it, but still could not get the Tech2 to "system seal" like it should. When turning on the Purge valve, the Vent valve closes and is indicated on the scan... Login to read more.