Вот все возможные причины ошибки P0443 по официальному мануалу, страница 01-02-140:
• Purge solenoid valve malfunction
• Connector or terminal malfunction
• Short to ground in the wiring harness between purge solenoid valve terminal B and PCM terminal 2AB
• 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 2AB
• Short to the power supply between purge solenoid valve terminal B and PCM terminal 2AB
• PCM malfunction
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