The engine warning light in the Lavida may illuminate due to the following 7 main reasons: Sensor Malfunction: The sensors involved include those for coolant temperature, crankshaft position, air flow, intake air temperature, and oxygen sensors. When these sensors are damaged, have poor contact, or experience signal interruptions, the vehicle's ECU cannot accurately obtain engine data, triggering the engine warning light. Fuel or Oil Quality Issues: Failure to use the fuel or engine oil as specified by the manufacturer may cause engine wear, leading to the illumination of the warning light. Poor Combustion of Air-Fuel Mixture: Poor combustion can result in engine carbon deposits or knocking. When detected by the oxygen sensor and reported to the ECU, the warning light will illuminate as a caution. Issues such as faulty spark plugs, defective ignition coils, fuel pump failure, or clogged fuel lines can all cause poor combustion of the air-fuel mixture. Turbocharger Problems: Issues with the intake boost pipes or turbocharger can also trigger the engine warning light. The most common problem is a damaged turbocharger, often accompanied by symptoms like oil leaks, excessive oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Intake Problems: If the vehicle's intake system is compromised, it may lead to blocked engine pipes, and in severe cases, the engine warning light will illuminate. A dirty or uncleaned air filter can cause intake problems. Exhaust Problems: Exhaust system faults can also cause the engine warning light to illuminate. Common causes include faulty rear oxygen sensors, catalytic converter issues, or problems with the exhaust camshaft and bearings. The catalytic converter is particularly prone to failure due to the use of leaded gasoline, lead- or silicon-containing lubricant additives, physical damage, or fuel system malfunctions. Anti-Theft System Malfunction: If the vehicle's electronic anti-theft system fails or if there is a mismatch between the anti-theft controller and the engine ECU, the anti-theft system may prevent the engine from operating correctly, accompanied by the illumination of the engine warning light. If the engine warning light illuminates, follow these steps: First, check if the engine is running normally. Look for symptoms like shaking or black smoke. If present, avoid restarting the engine. Note: Never restart the engine if the red warning light is on. If the engine can start, turn it off and wait 5-10 minutes. Without pressing the brake, press the start button once or turn the key halfway to the 'ON' position (without depressing the clutch). The vehicle will enter self-check mode upon powering up. Wait 5-10 seconds to see if the warning light turns off. If the light remains on, visit a service center as soon as possible. Technicians can use a portable diagnostic tool to read the fault codes, identify the issue, and perform targeted repairs.
