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DTC P0454: Evaporative Emission System Pressure Sensor/Switch Intermittent

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DTC P0454: EVAPORATIVE EMISSION SYSTEM PRESSURE SENSOR/SWITCH INTERMITTENT

Description:  The fuel tank pressure changes greater than 14 inches of water in 0.10 seconds.
Possible Causes: 
  • Intermittent open or short in the fuel tank pressure (FTP) sensor or the FTP sensor signal
  • Contaminated or damaged sensor
Diagnostic Aids:  Monitor the FTP PID and note if it changes from above 15 inches of water to below minus (-) 15 inches of water often in 1 minute.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All - - GO to PINPOINT TEST Z .
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