P144C - Evaporative Emission System Purge Check Valve Performance - DTC Chart

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P144C - EVAPORATIVE EMISSION SYSTEM PURGE CHECK VALVE PERFORMANCE - DTC CHART

Description: The EVAP check valve test is performed during minimal boost conditions, once per drive cycle, when entry conditions are met. This DTC sets when the fuel tank pressure exceeds a calibrated amount within a specified amount of time during the test.
Possible Causes: Restricted EVAP ejector connections at the intake air system Stuck open EVAP check valve Stuck closed EVAP check valve Damaged EVAP ejector Damaged EVAP check valve
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test HX .