What Causes the Engine Warning Light to Illuminate with Normal Driving but Shaking?
1 Answers
When the engine warning light is on and accompanied by vehicle shaking, the cause is typically poor combustion of the air-fuel mixture. Poor combustion leads to carbon buildup in the engine, which is the primary reason for vehicle shaking. Additionally, when the oxygen sensor detects poor combustion and reports it to the ECU, the warning light is triggered as an alert. This explains why the engine warning light and vehicle shaking often occur simultaneously. Several issues can lead to poor combustion of the air-fuel mixture, including faulty spark plugs, defective ignition coils, a malfunctioning fuel pump, or clogged fuel lines. If the engine warning light is illuminated, follow these steps: First, check whether the engine is running normally. Look for symptoms such as shaking, black smoke emissions, or difficulty starting. If any of these issues are present, avoid restarting the engine. Note: If the warning light is red, do not restart the engine under any circumstances. If the engine is running normally and the vehicle can still be driven, visit a service center as soon as possible to diagnose the issue. A service center can easily retrieve trouble codes using a portable diagnostic tool, allowing for targeted repairs based on the fault information. If the engine is running normally, the owner can also try gently reseating all wiring harness connectors, as a loose connection may be the cause. Alternatively, repeatedly turning the key to the ON position may help reset the warning light.
