Can the car still be driven if the exhaust controller is abnormal?
1 Answers
An abnormal exhaust controller indicates that the three-way catalytic converter in the exhaust system is damaged, which will cause the vehicle's exhaust emissions to exceed the standard. It is not recommended to continue driving the vehicle. If the exhaust controller is abnormal, the exhaust system warning light on the car's dashboard will illuminate, indicating that the three-way catalytic converter in the exhaust system is damaged. In such a case, the three-way catalytic converter should be replaced immediately. The three-way catalytic converter is located at the front section of the exhaust pipe and is used to purify the vehicle's exhaust emissions. Without a functioning three-way catalytic converter, the vehicle's exhaust emissions will exceed the standard and fail to meet environmental requirements. There are oxygen sensors both before and after the three-way catalytic converter. The sensor before the converter is called the front oxygen sensor, while the one after is called the rear oxygen sensor. The front oxygen sensor primarily measures the oxygen content in the exhaust, allowing the ECU to adjust the air-fuel ratio accordingly. The rear oxygen sensor mainly detects whether the three-way catalytic converter has failed. If the data transmitted to the ECU by both the front and rear oxygen sensors are the same, it indicates that the three-way catalytic converter has failed, and the exhaust system warning light on the dashboard will illuminate. A damaged three-way catalytic converter will cause the vehicle's exhaust emissions to exceed the standard, affecting the annual inspection. It should be replaced immediately. When replacing the three-way catalytic converter, it is recommended to choose an original equipment manufacturer (OEM) product, as OEM parts offer better reliability and durability, though they are relatively more expensive.