Black smoke problem on Skoda Octavia

Black smoke from the exhaust usually indicates a rich fuel mixture, meaning too much fuel and not enough air. This could be due to a faulty fuel injector, a clogged air filter, or a malfunctioning mass air flow sensor. Start by checking the air filter and replace it if it's dirty. If the problem persists, you might need to have the fuel injectors and mass air flow sensor checked by a professional. Please update us on your progress. Do you have any other questions?