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Home >> Chevrolet >> 2005 >> Classic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC P0301-P2401) >> Diagnostic Information & Procedures >> DTC P0455 >> Conditions For Setting the DTC
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Conditions For Setting the DTC

The EVAP system is not able to achieve or maintain 10 inches H2O vacuum during the diagnostic test for 24 seconds, during a 5 minute and 30 second test from the time the purge is enabled.