What are the reasons for the persistent engine warning light in Dongfeng Peugeot 301?
2 Answers
There are mainly 7 reasons for the engine warning light in Dongfeng Peugeot 301: Sensor malfunction: The sensors mentioned here include water temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or signal interruption, the car's ECU cannot accurately obtain engine data, which will cause the engine warning light to illuminate. Fuel quality issues: If fuel and engine oil are not added according to the manufacturer's requirements, it may cause engine wear, leading to the warning light turning on. Poor mixture combustion: Poor mixture combustion can cause engine carbon deposits or knocking. After being 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, fuel line blockage, etc., can all cause poor engine mixture combustion. Turbocharging issues: Intake turbocharging pipelines and turbochargers can also cause the engine warning light to illuminate. The most common issue is turbocharger damage, accompanied by symptoms such as oil leakage, high oil consumption, reduced power, metal 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 warning light will illuminate. If the air filter is not clean and not regularly cleaned, it can lead to intake problems. Exhaust issues: Exhaust faults can also cause the engine warning light to illuminate. Rear oxygen sensor, catalytic converter, exhaust camshaft, and bearing faults are all causes of exhaust problems, with the catalytic converter being the most common. Using leaded gasoline, lead or silicon-containing lubricant additives, physical damage to the catalytic converter, or engine fuel supply system failures can easily cause catalytic converter faults. Anti-theft system malfunction: 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 warning light will illuminate. If the engine warning light is on, follow these steps: First, check if the engine is running normally, whether there is shaking, black smoke, etc. If so, try not to start the engine again. Especially note, do not start the engine if the red light is on. 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 perform a self-check after powering on. Wait for 5-10 seconds and observe whether the warning light on the dashboard turns off. If the warning light does not turn off, please go to a service station as soon as possible to find the cause. The service station can use a portable diagnostic tool to read the fault code, obtain fault information, and perform targeted repairs.
I've been driving a Dongfeng Peugeot 301, and that time when the engine malfunction light came on was really unsettling. A constantly illuminated light usually indicates a sensor issue, such as a faulty oxygen sensor, which monitors exhaust emissions—once it fails, the light comes on. It could also be due to worn spark plugs or a failing ignition coil, leading to poor ignition. Additionally, the fuel system is related; low oil pressure or a clogged fuel filter can interrupt fuel supply. That time, I went to the repair shop, and the mechanic first used an OBD scanner to read the fault codes and identify the problem. I recommend not ignoring it, as it can affect fuel consumption and vehicle performance. Get it checked early to avoid costly repairs, especially for older cars like the 301, which are more prone to such minor issues.
