Why is the engine warning light on in the Tiggo 8?

[StAlaina]

The engine warning light in the Tiggo 8 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 connections, or their signals are interrupted, the vehicle's ECU cannot accurately obtain engine data, which can trigger the engine warning light. Fuel or oil quality issues: If the recommended fuel or engine oil is not used as specified by the manufacturer, it may cause engine wear, leading to the warning light turning on. Poor combustion of the air-fuel mixture: Incomplete combustion can result in engine carbon buildup or knocking. When detected by the oxygen sensor and reported to the ECU, the warning light will illuminate as an alert. Issues such as faulty spark plugs, ignition coils, fuel pumps, or clogged fuel lines can all contribute to poor combustion. Turbocharger problems: Issues with the intake boost pipes or the turbocharger itself can also cause the engine warning light to come on. 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 issues: Problems with the vehicle's air intake can lead to clogged engine pipes, and in severe cases, trigger the engine warning light. A dirty or uncleaned air filter can cause intake problems. Exhaust system issues: Exhaust faults can also illuminate the engine warning light. Common causes include faulty rear oxygen sensors, catalytic converter issues, or problems with the exhaust camshaft and bearings. The catalytic converter is the most frequent culprit. Using leaded gasoline, lead- or silicon-based oil additives, physical damage to the catalytic converter, or fuel system malfunctions can all lead to catalytic converter failure. Anti-theft system malfunction: If the vehicle's electronic anti-theft system fails or if the anti-theft controller is incompatible with the engine ECU, the anti-theft system can prevent the engine from operating normally, accompanied by the engine warning light. If the engine warning light comes on, follow these steps: First, check whether the engine is running normally. If there are issues like shaking or black smoke, avoid restarting the engine. Note: Do not restart the engine if the light is red. If the engine can start, turn it off and wait for 5-10 minutes. Without pressing the brake, press the start button once or turn the key halfway to the 'ON' position (without engaging the clutch). The vehicle will perform a self-check after powering on. 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 diagnostic tool to read the error codes, identify the issue, and perform targeted repairs.