Why does the Peugeot New 408 engine fault light come on?
2 Answers
The main reasons for the engine fault light in the Peugeot New 408 are as follows: 1. Difficulty in ignition: Excessive carbon deposits can cause the ignition coil to reverse breakdown, leading to ignition coil failure and poor ignition. In this case, you should go to a repair shop to have the carbon deposits cleaned. 2. Abnormal temperature sensor during cold start at low temperatures: The main cause of this situation is that the temperature is too low. Generally, this problem does not need to be solved. As long as the car is warmed up for a period of time, the fault light will naturally disappear. 3. Poor gasoline quality: When the car is filled with inferior gasoline, the fault light is easy to come on. If there is no obvious abnormality in the vehicle, you can continue to use it. It is recommended to choose a well-known gas station when refueling next time. 4. Carbon deposits in the intake tract and piston top: Carbon deposits in the intake tract will lead to poor atomization, resulting in incomplete combustion and the warning light coming on.
Last time I encountered this situation, it turned out to be caused by fuel quality issues. The engine warning light on the Peugeot New 408 suddenly came on, possibly just because some less clean gasoline was added to the tank. Nowadays, the quality of fuel at gas stations varies greatly, especially at smaller ones. It could also be that the fuel tank cap wasn't tightened properly, causing a leak in the tank and triggering an abnormal reading from the fuel tank pressure sensor. These kinds of occasional minor issues are the most common—just drive to the repair shop to clear the fault code with a computer, no need to rush into major repairs. However, if you notice the car accelerating weakly or idling roughly after the light comes on, you should get it checked immediately, as it might be an issue with the oxygen sensor or the catalytic converter. Delaying repairs could affect fuel consumption.
