2006 Mazda MX-5 Miata BaseFACTORY OEM SERVICE PROCEDURE

DTC P2404: Notes

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P2404)

DTC P2404 EVAP system leak detection pump sense circuit problem
DETECTION CONDITION 
  • The PCM monitors pump load current (EVAP line pressure), while evaporative leak monitor is operating. After obtaining the reference current value, if the time in which the pump load current reaches the reference current value is less than the specification, the PCM determines air filter has a malfunction.
Diagnostic support note 
  • This is a intermittent monitor (CCM).
  • 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 
  • Air filter clogging
  • EVAP hose bending
  • PCM malfunction
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