Why is the fault light on in Volkswagen Sagitar?
1 Answers
Introduction to the reasons for the Volkswagen Sagitar fault light being on: 1. Sensor issues: The sensors mentioned here include water temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or signal interruption, the car's ECU cannot accurately obtain engine data, which will cause the engine fault light to come on. 2. Maintenance issues: Poor engine maintenance is the most common cause of the engine fault light coming on. If the owner does not perform regular maintenance and has poor driving habits, it will increase the burden on the engine operation. 3. Oil quality issues: The oil quality mentioned here includes fuel and engine oil. The fuel injected into the car generally has a grade, and the engine oil is also divided into semi-synthetic and fully synthetic. The manufacturer usually recommends which grade of fuel and which type of engine oil the owner should use. If the owner does not add as required, it will cause engine wear over time, and the fault light will come on. 4. Poor mixture combustion: The engine's spark plug failure, ignition coil failure, fuel pump failure, fuel line blockage, etc. will all cause poor combustion of the engine mixture. Poor mixture combustion leads to engine carbon deposits or knocking problems, which will eventually be detected by the engine's oxygen sensor and reported to the ECU, naturally turning on the fault light as a warning. 5. Intake issues: When the engine is burning, it needs intake air. In this process, the air filter element is very important. If the car's air filter element is not clean and not cleaned regularly, it will affect the car's intake air. Over time, it can easily cause blockage, and in severe cases, it will cause the engine fault light to come on.
