The engine fault light is a warning light that informs the driver that there are certain faults in the vehicle that require inspection and repair. Some people use their cars without looking at the instrument panel, and some fault lights have been on for a long time without being detected, which is not good for the car. The vehicle should not have any fault lights on while driving, as long as the fault lights are on, it must be a problem with the vehicle. There are many fault lights on the car. Today, let's talk about the engine fault light, a yellow light shaped like a camera. Regardless of the car, this light comes on the most frequently. It is a fault light related to emissions, and any fault that affects the normal operation of the engine will light up.

   There are several situations when the engine fault light comes on: 1. The fault light remains on but there are no abnormalities in all aspects of the vehicle's operation; 2. The fault light is always on, and the vehicle also has obvious fault phenomena, such as severe shaking and weak acceleration; 3. The fault light turned on for a while or a few days, but then turned off again. The first two situations require a vehicle inspection. The first situation is not so urgent, so you can continue using the vehicle and take the time to have an inspection, but it is also best not to delay for too long. Those who don't pay much attention to the dashboard while driving often cannot detect the first situation, and may not see it until it lights up for many days. Therefore, as long as they discover it, they should also quickly go and check it. The second situation is to immediately inspect the vehicle, as there is a malfunction and the fault light is also on, indicating that there must be a problem with the vehicle. Failure to inspect and repair in a timely manner may lead to even greater malfunctions.

     The third situation is also very common, as long as the light is off, there is no need to conduct an inspection. There are several possibilities for this situation. Firstly, the sensor mistakenly reported a fault code, and as the vehicle is used, the computer discovers that there is no real fault. After experiencing several fires and self checks, the fault light will turn off by itself. Secondly, if the communication between the sensor and the computer is interrupted once or for a period of time due to an unexpected situation, the computer will also consider it a malfunction and turn on the fault light. But then communication resumed, and the fault light would automatically turn off after a few ignition attempts. The third is that a certain component or sensor is on the edge of damage, sometimes good or bad, and sometimes the fault light will turn on when it is bad. After a period of improvement, the fault light will turn off. Fourthly, there are other unexpected situations, such as problems with the gasoline being added, poor combustion resulting in a cylinder shortage, and combustion returning to normal after changing the fuel.

  In short, no matter what the cause is, as long as the current fault light is not on, there is no need to check because the data flow is always normal. Although there are saved historical fault codes, it does not indicate any problem. It can only be speculated that a certain component is damaged and cannot be 100% certain. Of course, if it often goes on and off, then it needs to be checked, and the retained fault code can basically determine the location of the fault.

    The fault light on the car is on and must be detected by a computer. By observing it with the naked eye, it is impossible to know what the fault is. People often ask online what kind of fault light a car has on, what is the problem? Even if the car is in front of us, this is still unanswerable. Because checking the fault light requires the help of a computer, without a computer, no one knows what the problem is and can only guess based on the fault phenomenon, which is simply not accurate. There are some difficult faults that cannot be accurately determined even if tested with a computer, as some faults have multiple causes and require maintenance personnel with sufficient experience and rich maintenance theory to make accurate judgments. So if it involves checking the fault light, you can directly go to a 4S store or a repair shop with a computer detector for inspection.

From: WONDEE Autoparts

2023-9-28