What to Do When the Car Exhaust Warning Light Comes On?

[RiverFitz]

Exhaust system warning light coming on may indicate an oxygen sensor malfunction or a damaged catalytic converter. When the exhaust system warning light illuminates, you should read the fault code to determine the exact location of the issue and then replace the faulty component. Additional information: 1. The engine exhaust system warning light often comes on due to poor fuel quality, which can damage the oxygen sensor in the catalytic converter system or cause catalytic converter poisoning. Check the front and rear oxygen sensors. The initial signs of damage include the engine exhaust system warning light staying on or occasionally flashing on the dashboard, though the car may still be drivable for a short time. 2. If left unrepaired for an extended period, the electronic fuel injection system's computer will not receive information about the oxygen concentration in the exhaust pipe, preventing it from performing feedback control on the air-fuel ratio. This can lead to increased fuel consumption and higher exhaust emissions, as well as engine issues such as unstable idling, misfires, and surging. Therefore, it is crucial to address the problem promptly or replace the faulty parts.