The Wuling Journey engine malfunction light may illuminate due to the following 7 main reasons: Sensor failure: The sensors mentioned here include coolant temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or experience signal interruption, the vehicle's ECU cannot accurately obtain engine data, which will cause the engine malfunction light to illuminate. Fuel quality issues: If the fuel and engine oil are not added as required by the manufacturer, it may cause engine wear, leading to the malfunction light illuminating. Poor combustion of the air-fuel mixture: Poor combustion of the air-fuel mixture can cause engine carbon deposits or knocking. When detected by the oxygen sensor and reported to the ECU, the malfunction light will illuminate as a warning. Spark plug failure, ignition coil failure, fuel pump failure, and fuel line blockage can all cause poor combustion of the engine air-fuel mixture. Turbocharging issues: The intake turbocharging pipeline and turbocharger can also cause the engine malfunction light to illuminate. The most common issue is turbocharger damage, accompanied by symptoms such as oil leakage, high oil consumption, reduced power, metallic noises, and blue or black smoke from the exhaust pipe. Intake issues: If there is a problem with the car's intake, it may cause engine pipeline blockage, and in severe cases, the engine malfunction light will illuminate. A dirty air filter that is not cleaned regularly can lead to intake problems. Exhaust issues: Exhaust faults can also cause the engine malfunction light to illuminate. The rear oxygen sensor, three-way catalytic converter, exhaust camshaft, and bearing faults are all causes of exhaust problems, with the three-way catalytic converter being the most common. Using leaded gasoline, lead or silicon-containing lubricant additives, physical damage to the three-way catalytic converter, and engine fuel supply system failures can easily cause three-way catalytic converter faults. Anti-theft system failure: If the car's electronic anti-theft system malfunctions, or if the anti-theft controller does not match the engine electronic controller, the anti-theft system can also cause the engine to malfunction, and the engine malfunction light will illuminate. If the engine malfunction light illuminates, follow these steps: First, check whether the engine is running normally, such as whether there is shaking, black smoke, etc. If so, try not to start the engine again. Especially note that if the red light is on, do not start the engine again. 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 car will enter self-test mode after powering on. Wait for 5-10 seconds and observe whether the malfunction light on the dashboard goes off. If the malfunction light does not go off, go 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.
