Will the Engine Light Come On If the Exhaust Fails?
1 Answers
If the exhaust fails, the engine light will come on. The oxygen sensor monitors the state of the engine's air-fuel mixture. When the mixture changes and causes excessive exhaust emissions, the control unit records the fault and illuminates the warning light to alert the driver. Exhaust Light Comes On After Refueling: If the exhaust emission warning light occasionally comes on after refueling, it is often due to substandard fuel quality, leading to incomplete combustion of the engine's air-fuel mixture. In such cases, it is advisable to avoid smaller gas stations when choosing where to refuel. Additionally, avoid refueling immediately after the gas station changes its oil supply. After refueling, you can add a high-quality fuel additive to improve fuel quality. Exhaust Light Stays On Continuously: If the exhaust emission light remains on continuously, a specialized diagnostic tool is needed to check the current fault codes stored in the engine. Based on the fault codes and the data from systems like the oxygen sensor, further troubleshooting is required. This is because any issues with sensors related to air-fuel mixture combustion, engine wiring, engine actuators (such as motors and solenoid valves), or the control unit can trigger the exhaust emission fault light.
