Why is the engine light on and the car shaking?
2 Answers
The reasons for the engine light being on and the car shaking: 1. Oxygen sensor failure, where the oxygen sensor is damaged or the sensor connector is damaged or loose, causing the mixture to be too lean or too rich; 2. Air flow sensor failure, where the air flow sensor or its circuit malfunctions, preventing the ECU from receiving the correct intake air signal, leading to improper fuel control and causing the mixture to be too lean or too rich, resulting in abnormal engine operation; 3. Spark plug carbon buildup, which can cause poor engine performance, manifesting as difficulty starting, unstable idle, poor acceleration, backfiring during sudden acceleration, and excessive exhaust emissions; 4. Engine knocking, characterized by weak car performance, excessive engine noise, and in severe cases, accompanied by knocking sounds from the cylinders.
When the engine light comes on yellow and the car shakes while I'm driving, it feels like an irregular heartbeat! This usually indicates a minor issue with the engine, and there are several common possibilities. First, consider the ignition system—worn spark plugs or faulty ignition coils can cause cylinder misfires. Fuel problems are another possibility, such as clogged fuel injectors or a weak fuel pump, leading to uneven fuel supply. Sensor failures, like an inaccurate oxygen sensor reading, can also cause the computer to incorrectly adjust the air-fuel mixture. A dirty air filter might restrict airflow and contribute to the issue. Worse yet, long-term neglect of maintenance can lead to carbon buildup, triggering these problems. If the shaking is severe, it's best not to push through, especially on the highway, as it can further damage the engine. I recommend pulling over immediately and having a professional shop check the trouble codes with a diagnostic tool—targeted fixes are much better than guessing. Remember to change the oil regularly and perform comprehensive inspections to prevent issues before they arise.
