DTC P0443:00: Notes

DTC P0443:00	Purge solenoid valve circuit problem
DETECTION CONDITION	The PCM monitors the purge solenoid valve control signal voltage and current. If the following conditions are met, the PCM determines that there is the purge solenoid valve control circuit problem. The PCM turns the purge solenoid valve off, but the voltage of the purge solenoid valve control signal remains low. The PCM turns the purge solenoid valve on, but the current of the purge solenoid valve control signal remains high. Diagnostic support note This is a continuous monitor (CCM). The check engine light 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 first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	-
POSSIBLE CAUSE	Purge solenoid valve connector or terminals malfunction Short to ground or open circuit in purge solenoid valve power supply circuit Short to ground in wiring harness between ENG BAR 15 A fuse and purge solenoid valve terminal B ENG BAR 15 A fuse malfunction Open circuit in wiring harness between main relay terminal C and purge solenoid valve terminal B Short to ground in wiring harness between purge solenoid valve terminal A and PCM terminal 1BA Purge solenoid valve malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between purge solenoid valve terminal A and PCM terminal 1BA Open circuit in wiring harness between purge solenoid valve terminal A and PCM terminal 1BA PCM malfunction
Courtesy of MAZDA MOTORS CORP.