Audi A4 rough idle issue causing engine to turn off on Audi A4

Some Audi A4 owners report experiencing rough idle issues that can lead to engine shutdown, often attributed to various causes. These include vacuum leaks, which can disrupt engine performance, and faulty ignition coils that contribute to unstable idling. Additionally, problems with fuel injectors may manifest as stalling or rough idling, while a malfunctioning Idle Air Control (IAC) valve can impede airflow at idle, exacerbating the issue. Furthermore, issues with the Mass Air Flow (MAF) sensor, responsible for measuring incoming air, might also be a factor in rough idling. To resolve these problems, owners may need to address vacuum leaks, inspect and replace faulty fuel injectors, maintain the IAC valve, and ensure the MAF sensor is functioning properly. It is crucial to diagnose the underlying cause of these symptoms, as indicators like a check engine light or poor fuel economy may suggest additional issues, such as a faulty O2 sensor.