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Home >> Mazda >> 2007 >> CX-9 Touring, 3.5 C, AWD >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System MZI-3.5) >> DTC P0455 >> Notes
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DTC P0455: Notes

DTC P0455 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0455 Evaporative emission system leak detected (gross leak/no flow)
DETECTION CONDITION 
  • P0455 indicates that a substantial leak or blockage has been detected in the EVAP system when there is -1.74 kPa (PID FTP_H2O displays "-7.0" or less vacuum for a 30 seconds evaluation time.
POSSIBLE CAUSE 
  • After-market EVAP hardware (such as fuel-filler cap) not conforming to required specifications.
  • Disconnected or cracked fuel chopping timer tube, CV solenoid valve outlet tube or EVAP return tube.
  • CV solenoid valve stuck closed
  • Damaged or missing fuel-filler cap.
  • Insufficient fuel-filler cap installation.
  • Loose fuel vapor hose/tube connections to EVAP system components.
  • Blockages or restrictions in fuel vapor hoses/tubes.
  • Rollover valve blocked or fuel shut-off valve.
  • CV solenoid valve stuck open.
  • Mechanically inoperative Fuel tank pressure sensor.
  • Damaged charcoal canister.