2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P0443: Notes

DTC P0443 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0443 Evaporative emission control system purge control valve circuit malfunction
DETECTION CONDITION 
  • PCM monitors input voltages from purge solenoid valve. If voltage at PCM terminal 85 remains low or high, PCM determines that purge solenoid valve circuit has malfunction.

Diagnostic support note 

  • This is a continuous 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.
  • DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Purge solenoid valve malfunction
  • Connector or terminal malfunction
  • Short to ground in wiring between purge solenoid valve terminal B and PCM terminal 85
  • Open circuit in wiring between main relay terminal D and purge solenoid valve terminal A
  • Open circuit in wiring between purge solenoid valve terminal B and PCM terminal 85
  • Short to power circuit between purge solenoid valve terminal B and PCM terminal 85
  • PCM malfunction
G04327935Courtesy of MAZDA MOTORS CORP.
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