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Home › Hummer › 2009 › H3 Alpha › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 5.3L - DTC P0315 To DTC P064A › DTC P0446 › Conditions for Setting the DTC

Conditions for Setting the DTC

The fuel tank vacuum is greater than 12 inches H2O vacuum for 5 seconds.
OR
The FTP is less than -2.5 inches H2O or more than +5 inches for 60 seconds after a cold start.