1. Faulty Oxygen Sensor: The oxygen sensor is responsible for measuring the amount of oxygen in the exhaust gas. If the sensor is not working properly, it can cause the emission warning light to come on.
2. Catalytic Converter Issues: The catalytic converter helps convert harmful pollutants in the exhaust gas into less harmful substances. If the catalytic converter is damaged or not functioning correctly, it can trigger the emission warning light.
3. Faulty EGR Valve: The EGR (Exhaust Gas Recirculation) valve helps reduce nitrogen oxide (NOx) emissions by recirculating a portion of the exhaust gas back into the engine. If the EGR valve is not operating properly, it can lead to increased emissions and the warning light may come on.
4. Fuel System Problems: Issues with the fuel injection system, such as a faulty fuel injector or a clogged fuel filter, can also cause the exhaust emission warning light to illuminate.
5. Turbocharger Issues: If the turbocharger (if equipped) is not functioning properly, it can affect the air-fuel mixture and cause increased emissions, leading to the warning light.
6. Vacuum Leaks: Vacuum leaks in the engine can cause the engine to run inefficiently and produce higher emissions, which can trigger the emission warning light.
7. Diesel Particulate Filter (DPF) Issues (Diesel Engines): Diesel vehicles may have a DPF to trap soot particles in the exhaust. If the DPF becomes blocked or damaged, it can cause the emission warning light to come on.
It's important to have the vehicle inspected by a qualified mechanic or a Skoda authorized service center to identify the exact cause of the exhaust emission warning light. Do not ignore the warning light as it could indicate a potential issue affecting your vehicle's emissions and performance.
