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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Control System - 4.3L (DTC P0171 To DTC P0507)) >> Diagnosis >> DTC P0455 >> Conditions For Setting the DTC

Conditions For Setting the DTC

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The EVAP system is not able to achieve or maintain vacuum during the diagnostic test.

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