Why is the engine warning light on in the Wuling mini truck?

[McVera]

There are mainly 7 reasons for the engine warning light being on in the Wuling Zhiguang mini truck: Sensor malfunction: The sensors mentioned here include coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or signal interruption, the vehicle's ECU cannot accurately obtain engine data, which will 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 and trigger the warning light. Poor fuel mixture combustion: Poor combustion of the air-fuel mixture can lead to engine carbon deposits or knocking. When detected by the oxygen sensor and reported to the ECU, the warning light will illuminate as an alert. Spark plug failure, ignition coil failure, fuel pump failure, and fuel line blockage can all cause poor combustion of the engine's air-fuel mixture. 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, and blue or black smoke from the exhaust. Intake issues: If there is a problem with the vehicle's air intake, it may cause engine pipeline blockage, and in severe cases, trigger the engine warning light. A dirty air filter that is not cleaned regularly can lead to intake problems. Exhaust issues: Exhaust system faults can also cause the engine warning light to illuminate. Common causes include rear oxygen sensor failure, three-way catalytic converter failure, exhaust camshaft and bearing failure, with the three-way catalytic converter being the most frequent issue. Using leaded gasoline, lead or silicon-containing lubricant additives, physical damage to the catalytic converter, or fuel system malfunctions can easily cause three-way catalytic converter failure. Anti-theft system malfunction: If the vehicle's electronic anti-theft system malfunctions, or if the anti-theft controller does not match the engine electronic controller, the anti-theft system can prevent the engine from operating normally while illuminating the warning light. If the engine warning light is on, follow these steps: First, check if the engine is running normally, looking for symptoms like shaking or black smoke. If present, avoid restarting the engine. Particularly, never restart 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 after powering on. Wait 5-10 seconds to see if the warning light turns off. If the warning light remains on, visit a service center as soon as possible. Technicians can use a portable diagnostic tool to read trouble codes, identify the issue, and perform targeted repairs.