How to Reset the Engine Fault Light on a Baojun Vehicle?
1 Answers
If the engine fault light is on, follow these steps: First, check if the engine is running normally. Look for issues such as shaking, black smoke emission, or difficulty starting. If any of these symptoms are present, avoid restarting the engine. Note: Do not restart the engine if the red light is on. If the engine runs normally and the vehicle can be driven, proceed to a service center as soon as possible to diagnose the issue. The service center can easily read the fault codes using a portable diagnostic tool and perform targeted repairs based on the fault information. If the engine runs normally, the owner can also try gently reconnecting various wiring harness connectors, as a loose connection might be the cause. Alternatively, repeatedly turning the key to the ON position may reset the fault light. Generally, the engine fault light may illuminate due to the following seven reasons: Sensor malfunction: Sensors such as coolant temperature, crankshaft position, air flow, intake temperature, and oxygen sensors may become damaged, have poor contact, or lose signal transmission. This prevents the vehicle's ECU from accurately obtaining engine data, triggering the fault light. Fuel or oil quality issues: Failure to use the fuel or engine oil specified by the manufacturer may cause engine wear, leading to the fault light illuminating. Poor combustion of the air-fuel mixture: This can result in engine carbon buildup or knocking. When detected by the oxygen sensor and reported to the ECU, the fault light will turn on as a warning. Causes include faulty spark plugs, ignition coils, fuel pumps, or clogged fuel lines. Turbocharger issues: Problems with the intake boost system or turbocharger can trigger the fault light. Common issues include turbocharger damage, accompanied by symptoms such as oil leaks, excessive oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Intake system issues: Blockages in the engine intake system can lead to the fault light turning on. A dirty or uncleaned air filter can cause intake problems. Exhaust system issues: Faults in the exhaust system, such as a malfunctioning rear oxygen sensor, catalytic converter, exhaust camshaft, or bearings, can trigger the fault light. The catalytic converter is the most common culprit, often damaged by leaded gasoline, improper lubricant additives, physical impact, or fuel system issues. Anti-theft system malfunction: If the vehicle's electronic anti-theft system fails or the anti-theft controller is incompatible with the engine ECU, the engine may not operate correctly, and the fault light will illuminate.
