What are the reasons for the engine warning light in the Baojun 730?

[DeCarmen]

Sensor issues, engine misfire, car maintenance problems, fuel quality issues, poor combustion of the air-fuel mixture, engine intake problems, turbocharging issues, exhaust problems, and anti-theft system malfunctions are the main causes of the engine warning light illuminating. Additionally, when starting the car, the vehicle performs a self-check on the engine system. Normally, the engine warning light should turn off after the self-check is completed. If it remains on for an extended period, you should promptly visit a repair shop to seek professional help and eliminate potential safety hazards. Below is a detailed explanation of each type of fault: Sensor Issues: Sensors include coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or experience signal interruptions, the car's ECU cannot accurately obtain engine data, which will trigger the engine warning light. Solution: If such issues occur, promptly visit a repair center for professional inspection to eliminate safety hazards. Maintenance Issues: Poor engine maintenance is the most common cause of the engine warning light. Vehicles have specific maintenance cycles. If maintenance is not performed on schedule, combined with poor driving habits, the engine's operational burden increases, eventually causing the engine warning light to illuminate as a reminder of a fault. Solution: Follow the time or mileage specified in your car's maintenance manual to perform comprehensive maintenance and rule out non-maintenance-related issues. Fuel Quality Issues: This includes both fuel and engine oil. The fuel used in cars usually has a specific octane rating, and engine oil can be semi-synthetic or fully synthetic. Manufacturers typically recommend which fuel octane rating and oil type to use. If the owner fails to adhere to these recommendations, long-term use can lead to engine wear, triggering the warning light. Solution: Use the appropriate fuel octane rating and engine oil grade as specified for your vehicle. Poor Combustion of Air-Fuel Mixture: Faulty spark plugs, fuel pump issues, or clogged fuel lines can lead to poor combustion of the air-fuel mixture in the engine. Poor combustion results in engine carbon buildup or knocking, which is detected by the oxygen sensor and reported to the ECU, triggering the warning light. Intake Issues: Engine combustion requires proper air intake, and the air filter plays a crucial role. If the air filter is dirty or not cleaned regularly, it can affect the engine's air intake, potentially leading to blockages and, in severe cases, illuminating the engine warning light. Solution: Regularly clean or replace the air filter to ensure the intake system functions properly. Turbocharging Issues: Intake boost pipes or turbocharger malfunctions can also trigger the engine warning light. The most common issue is turbocharger failure, often accompanied by oil leaks, excessive oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Solution: Visit a 4S shop to inspect and replace the turbocharger. In most cases, repair is not cost-effective, and replacement is recommended. Exhaust Issues: Rear oxygen sensors, catalytic converters, exhaust camshafts, and bearings can cause the engine warning light to illuminate. The most common issue is catalytic converter failure, often caused by physical damage or fuel system malfunctions. Solution: Use lead- or silicon-based lubricants for catalytic converter maintenance and cleaning. Anti-Theft System: If the car's anti-theft system malfunctions or the anti-theft controller is incompatible with the engine ECU, the engine may not operate correctly, and the warning light will illuminate. Solution: Visit a professional repair shop for a thorough system check, as this issue cannot be fixed individually. Engine Misfire: This occurs when one or more cylinders fail to operate or operate poorly, leading to insufficient power, difficulty starting, or unstable idling. Solution: First, identify which cylinder's components are faulty and replace them. If internal mechanical damage is detected, a major repair at a professional shop is necessary.