2006 Mazda 6 MazdaspeedFACTORY OEM SERVICE PROCEDURE

DTC P0443: Notes

DTC P0443 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0443 EVAP control system purge control valve circuit malfunction
DETECTION CONDITION 
  • PCM monitors the input voltages from the purge solenoid valve. If the voltage remains low or high, the PCM determines that the purge solenoid valve circuit has a malfunction.

Diagnostic support note 
  • This is an continuous monitor (CCM).
  • 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.
  • DTCs are stored in the PCM memory.
POSSIBLE CAUSE 
  • Purge solenoid valve malfunction
  • Connector or terminal malfunction
  • Short to ground in the wiring harness between purge solenoid valve terminal B and PCM terminal 4T
  • Open circuit in the wiring harness between the main relay and purge solenoid valve terminal A
  • Open circuit in the wiring harness between purge solenoid valve terminal B and PCM terminal 4T
  • Short to the power supply between purge solenoid valve terminal B and PCM terminal 4T
  • PCM malfunction
G04324124Courtesy of MAZDA MOTORS CORP.
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