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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 623 (ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM])DTC P0456NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P0456: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
WARNING: This page is about a different car, the 2008 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0456 DETECTION & CONDITION POSSIBLE CAUSES

DTC P0456 EVAP system leak detected (very small leak)
DETECTION CONDITION 
  • The PCM monitors the pump load current (EVAP line pressure) when a specified period has passed after EVAP system is sealed after the ignition switch is turned off. If the pump load current does not reach the reference load value or the rate of the load increase is lower than specified within a specified period, the PCM determines that the EVAP system has a very small leak.

    MONITORING CONDITION 

    • BARO: more than 72 kPa {542 mmHg, 21.33 inHg} 
    • IAT: 5-40 °C {41-104 °F} 
    • Fuel tank level: 15-85% 
    • Battery voltage: 11.0-14.6 V 
    • Ignition switch: OFF

Diagnostic support note 
  • This is an intermittent monitor (EVAP system).
  • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Purge solenoid valve malfunction
  • Leakage EVAP system
  • EVAP system leak detection pump malfunction
  • PCM malfunction
RENDER: 1.0x

NO RELATED

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