What are the reasons for the constant illumination of the Geely Emgrand GL engine warning light?
3 Answers
The reasons for the illumination of the Geely Emgrand GL engine warning light mainly include the following 7: Sensor failure: The sensors mentioned here include water temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or their signals are interrupted, the vehicle's ECU cannot accurately obtain engine data, which will then trigger the engine warning light. Fuel quality issues: If fuel and engine oil are not added as required by the manufacturer, it may cause engine wear, leading to the illumination of the warning light. Poor combustion of the air-fuel mixture: Poor combustion can lead to engine carbon buildup or knocking. When detected by the oxygen sensor and reported to the ECU, the warning light will illuminate as a warning. Spark plug failure, ignition coil failure, fuel pump failure, or clogged fuel lines can all cause poor combustion of the engine's air-fuel mixture. Turbocharging issues: The intake turbocharging pipeline and turbocharger can also trigger the engine warning light. The most common issue is turbocharger damage, accompanied by symptoms such as oil leakage, high oil consumption, reduced power, metal noises, or blue/black smoke from the exhaust pipe. Intake issues: If the vehicle's intake system has problems, 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 failures can also trigger the engine warning light. Rear oxygen sensor failure, catalytic converter failure, exhaust camshaft and bearing failure are all causes of exhaust problems, with the catalytic converter being the most common. Using leaded gasoline, lead or silicon-based lubricant additives, physical damage to the catalytic converter, or fuel system failures can easily cause catalytic converter issues. Anti-theft system failure: If the vehicle's electronic anti-theft system malfunctions or the anti-theft controller does not match 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 illuminated, follow these steps: First, check if the engine is running normally, such as whether there is shaking or black smoke. If so, avoid restarting the engine. Especially if the red warning light is on, do not restart the engine. If the engine can be started, turn it off for 5-10 minutes, then 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 for 5-10 seconds and observe whether the warning light on the dashboard turns off. If the warning light does not turn off, visit a service station as soon as possible to diagnose the issue. The service station can use a portable diagnostic tool to read the fault code, obtain fault information, and perform targeted repairs.
I've been in the auto repair industry for over a decade and frequently encounter issues with the Geely Emgrand GL's engine warning light. Common causes include aging exhaust oxygen sensors leading to excessive emissions, fuel supply system blockages affecting combustion efficiency, or damaged ignition coils causing unstable ignition. Poor electrical connections are also frequent problems, especially in humid or rainy environments where corroded connectors easily loosen. Never ignore a lit warning light and continue driving - fuel consumption will spike dramatically, and it may lead to engine overheating. The most reliable solution is to immediately visit a repair shop to read diagnostic trouble codes, accurately identify the problem, and perform targeted repairs or part replacements for a worry-free fix. Regular maintenance while driving, including periodic checks of sensors and circuits, can effectively prevent such faults.
Last year, the engine light on my Emgrand GL kept staying on, which really worried me. It turned out the catalytic converter was clogged, causing exhaust flow issues that triggered the warning light. During that period, the fuel consumption was ridiculously high, and the car lacked power when accelerating. I eventually took it to the repair shop and spent over 500 yuan to replace the part before solving the problem. This experience taught me that poor fuel quality or frequent short-distance driving can easily lead to carbon buildup, causing sensor false alarms. For daily maintenance, I need to change the air filter regularly and use gasoline with the appropriate octane rating. If the warning light comes on, first check for abnormal vibrations or smoke. If present, stop immediately and call for a tow truck—don't risk driving long distances to avoid causing more serious damage that would hurt both the car and your wallet.
