2006 Mazda MX-5 Miata BaseFACTORY OEM SERVICE PROCEDURE

DTC P2407: Notes

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P2407)

DTC P2407 EVAP system leak detection pump sense circuit intermittent
DETECTION CONDITION 
  • The PCM monitors pump load current (EVAP line pressure), while evaporative leak monitor is operating. When either of the following is detected 6 times or more successively, the PCM determines EVAP system leak detection pump heater has a malfunction:
    • While obtaining the reference current value, the change in pump load current exceeds the specification.
    • After obtaining the reference current value, the pump load current is kept lower than the maximum pump load current for more than the specified time.
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 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 
  • EVAP system leak detection pump heater malfunction
  • PCM malfunction
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