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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2090 (Engine Controls - Powertrain DTC Charts And Descriptions (Except Diesel & Hybrid)) >> DTC Diagnosis >> P0453 - Evaporative Emission System Pressure Sensor/Switch High

P0453 - Evaporative Emission System Pressure Sensor/Switch High

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2008 Mercury Sable, 2008 Mercury Mountaineer, 2008 Mercury Milan, 2008 Mercury Mariner, and 2008 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
P0453 - EVAPORATIVE EMISSION SYSTEM PRESSURE SENSOR/SWITCH HIGH

Description:  The powertrain control module (PCM) monitors the evaporative emission (EVAP) control system fuel tank pressure (FTP) sensor input signal to the PCM. The test fails when the signal average jumps above a minimum allowable calibrated parameter.
Possible Causes: 
  • FTP circuit open
  • VREF short to VPWR
  • FTP circuit short to VREF or VPWR
  • SIG RTN circuit open
  • Damaged FTP sensor
Diagnostic Aids:  An FTP voltage PID reading greater than 4.50 volts in key ON, engine OFF or key ON, engine running indicates a concern is present.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST HX .
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