What causes the yellow warning light on the dashboard after starting the engine?

1 Answers
VonAnderson
07/30/25 7:53am
The reason for the yellow warning light on the dashboard after starting the engine is an engine malfunction that requires prompt repair. Causes of engine malfunctions include sensor issues, maintenance problems, and fuel quality problems. Sensors involved may include those for coolant temperature, crankshaft position, air flow, intake air temperature, oxygen levels, etc. When these sensors are damaged, the ECU will send a signal, causing the engine warning light to illuminate. Prolonged lack of engine maintenance can also trigger the engine warning light, so it's important to perform regular car maintenance. Additionally, vehicles require specific fuel grades. If a car consistently uses fuel that doesn't meet the recommended grade, it can lead to engine wear and trigger the warning light.
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