Why does the engine warning light of the Baojun 510 come on?

[SanGabriel]

The main reasons for the engine warning light to come on include sensor malfunctions, engine misfire, vehicle maintenance issues, fuel quality problems, poor combustion of the air-fuel mixture, engine intake issues, turbocharging problems, exhaust system faults, and anti-theft system malfunctions. Additionally, during vehicle startup, the system performs a self-check on the engine. Normally, the engine warning light should turn off after the self-check. If it remains on for an extended period, it is advisable to visit a repair station for professional assistance to diagnose and eliminate potential safety hazards. Below is a detailed explanation of each possible fault: Sensor Issues: Sensors such as coolant temperature, crankshaft position, air flow, intake temperature, and oxygen sensors may become damaged, have poor connections, or experience signal interruptions. When the vehicle's ECU cannot accurately obtain engine data due to these issues, the engine warning light will illuminate. Solution: Seek professional inspection and repair at a service center to promptly address safety concerns. Maintenance Issues: Poor engine maintenance is one of the most common causes of the engine warning light turning on. Vehicles have specific maintenance schedules, and neglecting these schedules, combined with poor driving habits, can increase the engine's operational burden, eventually triggering the warning light. Solution: Follow the maintenance schedule outlined in the vehicle's manual, including time or mileage intervals, to ensure comprehensive maintenance and rule out non-maintenance-related issues. Fuel Quality Issues: This refers to both fuel and engine oil. Vehicles require specific fuel grades and types of engine oil (e.g., semi-synthetic or fully synthetic). If the wrong fuel or oil is used over time, it can lead to engine wear and trigger the warning light. Solution: Always use the recommended fuel grade and appropriate engine oil for the vehicle. Poor Combustion of Air-Fuel Mixture: Faulty spark plugs, fuel pump issues, or clogged fuel lines can cause poor combustion of the air-fuel mixture, leading to engine carbon buildup or knocking. These issues are detected by the oxygen sensor, which reports to the ECU, resulting in the warning light turning on. Intake Issues: The engine requires proper air intake, where the air filter plays a crucial role. A dirty or clogged air filter can restrict airflow, potentially leading to blockages and triggering the engine warning light. Solution: Regularly clean or replace the air filter to ensure the intake system functions properly. Turbocharging Issues: Problems with the intake boost pipes or turbocharger can cause the engine warning light to illuminate. Common issues include turbocharger damage, accompanied by symptoms like oil leaks, excessive oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Solution: Visit a 4S shop for inspection and replacement of the turbocharger. In most cases, repair is not cost-effective, and replacement is recommended. Exhaust Issues: Faults in the rear oxygen sensor, catalytic converter, exhaust camshaft, or bearings can trigger the warning light. The catalytic converter is particularly prone to damage due to impacts or fuel system malfunctions. Solution: Use lead- or silicon-based lubricants for maintenance and cleaning of the catalytic converter. Anti-Theft System: If the vehicle's electronic 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 turn on. Solution: Professional diagnosis and repair at a specialized service center are required, as this issue cannot be fixed individually. Engine Misfire: This occurs when one or more cylinders fail to function properly, leading to symptoms like reduced power, difficulty starting, or unstable idling. Solution: Identify and replace faulty cylinder components. If internal mechanical damage is detected, a major repair at a service center may be necessary.