When the exhaust system fault light of the car comes on, you should first try to restart the vehicle to rule out that it is a temporary problem. If the problem persists, you should check whether there are other warning lights on the dashboard. If so, the problem may be more complicated and you should contact a professional maintenance personnel as soon as possible for inspection and repair. 12

Using an OBD2 scanner to check the fault code is also an effective solution. If you have an OBD2 scanner on hand, you can connect it to the vehicle's diagnostic interface to obtain fault codes, which help determine the specific location of the problem. If you don't have an OBD2 scanner, you can go to a nearby auto repair shop or dealer for free testing.

During driving, if the exhaust system fault light flashes or the vehicle shakes, it is recommended to slow down immediately and find a nearby repair shop for inspection and repair. If the vehicle cannot start after the fault light comes on, it is likely that there is a problem with the fuel pump or ignition device. At this time, you should contact a professional maintenance personnel as soon as possible for processing.

The reasons for the engine exhaust system fault light to come on may include oxygen sensor damage, three-way catalytic converter poisoning, fuel pump or ignition device failure, etc. It is recommended to perform regular vehicle maintenance, use high-quality fuel, and regulate driving behavior to reduce the occurrence of such problems.

In short, when the exhaust system fault light comes on, timely inspection and repair are the key to avoid greater losses and safety hazards.