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HOMESERVICE MANUALSMERCURY2009MOUNTAINEER 4.6 8, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID)DTC DIAGNOSISDTC P0451: - EVAPORATIVE EMISSION SYSTEM PRESSURE SENSOR/SWITCH RANGE/PERFORMANCE
2009 Mercury Mountaineer 4.6 8, RWD

DTC P0451: - Evaporative Emission System Pressure Sensor/Switch Range/Performance

2009 Mercury Mountaineer 4.6 8, RWDSECTION DTC P0451: - Evaporative Emission System Pressure Sensor/Switch Range/Performance
DTC P0451: - EVAPORATIVE EMISSION SYSTEM PRESSURE SENSOR/SWITCH RANGE/PERFORMANCE

Description:  This DTC sets for a fuel tank pressure (FTP) sensor range (offset) concern. The FTP sensor output is offset by greater than 1.7 inches of water or less than -1.7 inches of water.
Possible Causes: 
  • Intermittent open or short in the FTP sensor or the FTP sensor signal
  • Contaminated or damaged sensor
  • Damaged powertrain control module (PCM)
Diagnostic Aids:  With the FTP sensor at atmospheric pressure, the FTP PID normally indicates 0 inches of water.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test HX .
RENDER: 1.0x

NO RELATED

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