The main reasons for the Scirocco's engine warning light to illuminate are the following 7: Sensor failure: The sensors mentioned here include those for water temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or experience signal interruption, the car's ECU cannot accurately obtain engine data, which will then cause the engine warning light to illuminate. Fuel quality issues: If fuel and engine oil are not added according to the manufacturer's requirements, it may cause engine wear, leading to the warning light illuminating. Poor mixture combustion: Poor mixture combustion can cause engine carbon buildup or knocking. When detected by the oxygen sensor and reported to the ECU, the warning light will illuminate as a warning. Issues such as spark plug failure, ignition coil failure, fuel pump failure, or fuel line blockage can all cause poor mixture combustion in the engine. Turbocharging issues: The intake turbocharging pipeline and turbocharger can also cause the engine warning light to illuminate. The most common issue is turbocharger damage, accompanied by symptoms such as oil leaks, high oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust pipe. Intake issues: If there are problems with the car's intake, it may lead to engine pipeline blockages, and in severe cases, cause the engine warning light to illuminate. A dirty air filter that is not regularly cleaned can lead to intake problems. Exhaust issues: Exhaust faults can also cause the engine warning light to illuminate. Causes of exhaust problems include the rear oxygen sensor, catalytic converter, exhaust camshaft, and bearing faults, with the catalytic converter being the most common. Using leaded gasoline, lead or silicon-containing lubricant additives, physical damage to the catalytic converter, or engine fuel system failures can easily cause catalytic converter issues. Anti-theft system failure: If the car's electronic anti-theft system malfunctions, or if the anti-theft controller does not match the engine electronic controller, the anti-theft system can also prevent the engine from operating normally, while the engine warning light illuminates. If the engine warning light is on, follow these steps: First, check if the engine is running normally, whether there is shaking, black smoke, etc. If so, try not to start the engine again. Especially note, do not start the engine if the red light is on. If the engine can be started, turn it off for 5-10 minutes, then without pressing the brake, press the start button once, or without pressing the clutch, turn the car key halfway to the 'on' position. The car will perform a self-check after powering on. Wait for 5-10 seconds and observe if the warning light on the dashboard turns off. If the warning light does not turn off, please visit a service station as soon as possible to find the cause. The service station can use a portable diagnostic tool to read the fault codes, obtain fault information, and perform targeted repairs.
