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Home >> Buick >> 2007 >> Rainier 5.3 M, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L - DTC P0351 To DTC P3449 >> DTC P0443 or P0449 >> Circuit/System Verification >> P0449

Circuit/System Verification: P0449

  1. With the ignition ON and the engine OFF, command the EVAP vent solenoid ON and OFF with a scan tool.
  2. Listen for a click when the valve operates. Verify that both the ON and the OFF states are commanded.
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