What is the reason for the Audi alarm indicating a maximum speed of 4000 rpm?
1 Answers
Audi vehicle speed function restriction indicator light comes on for the following reasons: 1. Poor quality gasoline that does not meet standards. Shortly after refueling, the engine fault light on the car's dashboard comes on. This is because low-quality gasoline was added at an unregulated gas station, causing the air-fuel mixture to burn improperly during engine operation. 2. Spark plug carbon buildup. Carbon buildup on spark plugs can lead to poor engine performance, resulting in abnormal phenomena such as difficulty starting, unstable idling, poor acceleration, backfiring during sudden acceleration, excessive exhaust emissions, and increased fuel consumption. 3. Oxygen sensor failure. The oxygen sensor is a fairly durable component. As long as the fuel quality is up to standard, it can last for 3 years or longer. Therefore, if the fault light comes on in a new car, it's advisable to check if the oxygen sensor plug is loose.