What Causes the Engine Warning Light to Flash and the Vehicle Body to Shake?
2 Answers
The reasons for the engine warning light flashing and the vehicle body shaking: 1. Severe engine carbon buildup; 2. Excessive carbon buildup in the fuel injectors; 3. Dirty throttle body. Excessive carbon buildup inside the engine can cause the gasoline sprayed during a cold start to be absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture and making it difficult to start. Solutions: 1. Clean the throttle body and engine carbon buildup; 2. Replace the spark plugs and oil seals. If the vehicle body still shakes during idle after these steps, it is necessary to check whether the intake pressure sensor and fuel supply pressure are normal. It is recommended to have a repair shop inspect the fuel supply pressure and intake pressure sensor for proper functioning, and replace components if necessary.
If the engine malfunction indicator light is flashing while the vehicle body is shaking, this often indicates an issue with the ignition system. For example, worn spark plugs or damaged ignition coils can cause cylinder misfires, leading to unstable combustion of the air-fuel mixture and resulting in vehicle shuddering. Alternatively, clogged fuel injectors causing uneven fuel delivery can also induce shaking; a faulty oxygen sensor may disrupt the engine control unit's operations. Another common cause is an air intake system leak or a malfunctioning mass airflow sensor, as too much or too little air can make the engine struggle. In severe cases, it could be due to valve or piston problems. Once encountering this situation, I believe you should immediately turn on the hazard lights, slowly pull over to the side, and avoid continuing to drive, as it concerns driving safety. Quickly call for a tow truck to take the vehicle to a professional repair shop for diagnostic trouble code scanning.
