Does the Exhaust Light and Malfunction Light Need Repair?
1 Answers
Exhaust light and malfunction light require repair. Diagnosis method: Start and turn off the vehicle three times consecutively, or disconnect the negative terminal of the battery, wait for 30 seconds, and then reconnect it. After performing these steps, check whether the warning lights on the dashboard are still illuminated. This method only applies to false malfunctions. If the malfunction light is caused by a damaged oxygen sensor in the three-way catalytic system or poisoning of the catalytic converter, inspection and repair should be conducted, and the corresponding components should be replaced. Cause of malfunction: The main cause is excessive carbon deposits in the throttle or engine internals, leading to an imbalance in the air-fuel mixture ratio. When the engine control unit detects signals that affect emission requirements, the malfunction light will illuminate. Frequently shifting to a higher gear at low engine speeds can also lead to this phenomenon. Due to the use of fuel or lubricating oil, the catalytic converter may become poisoned, its activity may decrease, and its conversion efficiency may be affected. Sulfur and phosphorus complexes and deposits may form inside the three-way catalytic converter, thereby deteriorating vehicle performance, reducing power output, increasing fuel consumption, worsening emissions, and ultimately causing the malfunction light to illuminate.
