What Causes the Engine Warning Light to Illuminate in the Lingpai?

[OAlexis]

There are primarily 7 reasons for the engine warning light to illuminate: Sensor malfunction: The sensors referred to here include those for coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When these sensors are damaged, have poor connections, or experience signal interruptions, the vehicle's ECU cannot accurately obtain engine data, which will then trigger the engine warning light. Fuel or oil quality issues: If fuel or engine oil is not added according to the manufacturer's requirements, 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. Once 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 air-fuel mixture. Turbocharging issues: The intake turbocharging pipeline or the turbocharger itself can also cause the engine warning light to illuminate. The most common issue is damage to the turbocharger, accompanied by symptoms such as oil leaks, excessive oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Intake issues: If there is a problem with the vehicle's intake system, it may lead to clogged engine pipelines, and in severe cases, trigger the engine warning light. A dirty air filter that is not cleaned regularly can cause intake problems. Exhaust issues: Exhaust system faults can also cause the engine warning light to illuminate. Causes include faults in the rear oxygen sensor, catalytic converter, exhaust camshaft, or bearings, with the catalytic converter being the most common issue. Using leaded gasoline, lead or silicon-based lubricant additives, physical damage to the catalytic converter, or faults in the engine fuel supply system can easily lead to 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, also causing the engine warning light to illuminate. If the engine warning light illuminates, follow these steps: First, check whether the engine is operating normally, looking for signs of shaking, black smoke, etc. If such issues are present, avoid restarting the engine. Especially note that if the red warning light is on, do not restart the engine under any circumstances. If the engine can be started, 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 depressing the clutch. The vehicle will perform a self-check after powering on. Wait for 5-10 seconds to see if the warning light on the dashboard turns off. If the warning light remains on, proceed to a service station as soon as possible to diagnose the issue. The service station can use a portable diagnostic tool to read the fault codes, obtain fault information, and perform targeted repairs.