What are the reasons for the engine light turning yellow?
2 Answers
There are several reasons for the engine light turning yellow: 1. Sensor issues: These include the water temperature sensor, crankshaft position sensor, air flow sensor, intake temperature sensor, oxygen sensor, etc. When these sensors are damaged, have poor contact, or experience signal interruption, the car's ECU cannot accurately obtain engine data, which will trigger the engine fault light. 2. Poor engine maintenance or bad driving habits. 3. The owner does not add engine oil as required, which will cause engine wear over time. 4. Poor combustion of the air-fuel mixture: Faulty spark plugs, ignition coils, fuel pump, or clogged fuel lines can all lead to poor combustion of the engine's air-fuel mixture.
I was startled when the engine light suddenly turned yellow while driving, so I went to the repair shop for a check. The mechanic explained that this usually indicates a fault in the emission system, such as a malfunctioning oxygen sensor or a clogged fuel line. Common causes also include aging spark plugs, a loose fuel cap, or an exhaust leak. In my case, the oxygen sensor was faulty, and everything returned to normal after replacement. Never ignore a persistent light—minor issues can escalate into major problems like increased fuel consumption or engine damage. Pay attention to your car's condition regularly, and routine maintenance can prevent these issues. Remember, timely diagnosis of trouble codes is key to solving problems and avoiding breakdowns on the road.
