What Causes Idle Vibration in Audi Q5L?

[LaEmery]

Audi Q5L idle vibration may be caused by the following reasons: Severe engine carbon deposits: Dirty throttle body or excessive carbon buildup in the fuel injectors are the most common causes of engine vibration. After driving for a period of time, a dirty throttle body may cause improper closing or idle stepper motor sticking, both of which can result in excessively high idle speed. Carbon deposits generated during engine operation can also cause vehicle vibration, especially when starting the vehicle. The engine may vibrate more intensely than usual, and sometimes may even fail to start on the first attempt. Ignition system malfunction: Spark plugs, high-voltage wires, and ignition coils may exhibit poor performance after a certain period of operation. Unstable fuel pressure: Abnormal fuel pump supply pressure or incorrect readings and poor performance of the intake pressure sensor can cause engine vibration.