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DTC P144C - EVAP System Purge Flow Performance During Boost

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P144C - EVAP SYSTEM PURGE FLOW PERFORMANCE DURING BOOST

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 .