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Re: chev pickup evap p0446
Posted to Technical Discussion Forum on 11/27/2008 1 Reply

Hi Jim,

See anything in the FF/FR? FTP has to be less than -12" water for more than 5 seconds to set the code. With vent valve open and 100% canister purge commanded, FTP should not exceed 9" water. Seems kinda high (low) but I see 5-6" all the time doing th... Login to read more.

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