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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 753 (Engine Controls - Powertrain DTC Charts & Descriptions - CNG, Flex-Fuel & Gasoline) >> Diagnostic Trouble Code (DTC) Charts >> P0456: EVAP Control System Leak Detected (Very Small Leak)

P0456: EVAP Control System Leak Detected (Very Small Leak)

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P0456 - EVAP CONTROL SYSTEM LEAK DETECTED (VERY SMALL LEAK)

Description:  The PCM monitors the complete EVAP control system for the presence of a very small fuel vapor leak. The system failure occurs when a fuel vapor leak from an opening as small as 0.508 mm (0.020 inch) is detected by the EVAP running loss monitor test.
Possible Causes: 
  • Very small holes or cuts in the fuel vapor hoses/tubes.
  • Loose fuel vapor hose/tube connections to the EVAP system components.
  • EVAP system component seals leaking (refer to Possible Causes under DTC P0442).
Diagnostic Aids:  -
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All - - GO to PINPOINT TEST HX: EVAPORATIVE EMISSION (EVAP) MONITOR AND SYSTEM Step 55.