What are the reasons for the engine warning light in Wuling Hongguang S?
2 Answers
The engine warning light in Wuling Hongguang S EV can be triggered by the following 7 main reasons: Sensor malfunction: This includes sensors such as coolant temperature, crankshaft position, air flow, intake temperature, and oxygen sensors. When these sensors are damaged, have poor contact, or signal interruptions occur, the vehicle's ECU cannot accurately obtain engine data, causing the engine warning light to illuminate. Fuel quality issues: Failure to use the fuel and engine oil as specified by the manufacturer may cause engine wear, leading to the warning light turning on. Poor fuel mixture combustion: Poor 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 a warning. Issues such as spark plug failure, ignition coil failure, fuel pump failure, or fuel line blockages can all cause poor fuel mixture combustion. Turbocharger problems: Issues with the intake turbo piping or turbocharger can also trigger the engine warning light. The most common issue is turbocharger damage, 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 engine pipe blockages, and in severe cases, the engine warning light may illuminate. A dirty air filter that hasn't been cleaned regularly can cause intake issues. Exhaust problems: Exhaust system faults can also trigger the engine warning light. Causes include rear oxygen sensor failure, catalytic converter issues, exhaust camshaft and bearing failures, with the catalytic converter being the most common culprit. Using leaded gasoline, lead- or silicon-based lubricant 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's electronic controller, the anti-theft system can prevent the engine from operating normally, while also triggering the engine 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. Note: Do not restart the engine if the red warning light is on. If the engine can be started, 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 pressing 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 warning 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.
I also encountered the warning light coming on when driving the Wuling Hongguang S for deliveries. It's mostly due to these common issues: poor fuel quality causing incomplete combustion, which immediately triggers the yellow warning light on the dashboard in protest; or carrying too heavy a load leading to carbon buildup clogging the oxygen sensor—once it fails, the warning light pops up. Another possibility is a small problem like a leaking crankcase ventilation valve; the onboard computer detects the anomaly and lights up the warning. Once, my fuel cap wasn't tightened properly, and the warning light kept flashing while driving. However, if the car shakes or feels sluggish when accelerating along with the light, it’s likely an issue with the ignition coil or spark plugs—pull over immediately and call a mechanic. Since this truck is mainly used for hauling, its sensors get dirty easily, so remember to clean carbon deposits regularly.
