What Causes the Engine Yellow Light to Appear?
1 Answers
Engine yellow light appears due to the following reasons: 1. Sensor issues. Sensors include coolant temperature, crankshaft position, air flow, intake temperature, oxygen sensor, etc. When these sensors are damaged, have poor contact, or experience signal interruption, the vehicle's ECU cannot accurately obtain engine data, which will trigger the engine warning light. 2. Maintenance issues. Vehicles have specific maintenance cycles. If the owner fails to perform maintenance on schedule, coupled with poor driving habits, it will increase the burden on engine operation. 3. Fuel quality issues. Fuel quality includes both fuel and engine oil. The fuel used in cars generally has a specific grade, and engine oil can be semi-synthetic or fully synthetic. Manufacturers usually recommend which fuel grade and type of engine oil to use. If the owner does not follow these recommendations, long-term use can cause engine wear. 4. Poor combustion of the air-fuel mixture. Issues such as faulty spark plugs, ignition coils, fuel pump, or clogged fuel lines can lead to poor combustion of the engine's air-fuel mixture. 5. Air intake issues. The engine requires air intake during combustion, making the air filter crucial. If the car's air filter is dirty and not cleaned regularly, it can affect the vehicle's air intake. Over time, this can lead to blockages, and in severe cases, trigger the engine warning light.
