What are the symptoms of a faulty Passat mass airflow sensor?
2 Answers
Airflow sensor failure can manifest as unstable idle speed, increased fuel consumption, lack of acceleration power, and more severe exhaust emissions. Types of mass airflow sensors: Vane-type airflow sensor, optical Karman vortex airflow sensor, Karman vortex airflow sensor, ultrasonic Karman vortex airflow sensor. Functions of mass airflow sensor: It can detect the engine's air intake volume, convert the information about engine air intake into electrical signals sent to the ECU, thereby providing safety alerts to the driver. It can be applied in industrial production, biotechnology, scientific experiments, environmental protection, and other fields.
My Passat has been feeling off lately. When starting, the engine shakes quite violently, and it feels like there's no power when I press the accelerator—the car responds much slower than before. The yellow engine warning light on the dashboard has been staying on. I didn’t pay much attention at first, but later I noticed the fuel consumption has increased significantly—a full tank doesn’t last as long as it used to, and I have to refuel much sooner. Once, after parking and turning off the engine, I had to try several times to restart it, which really scared me, so I immediately went to see a mechanic. The mechanic said the mass airflow sensor was faulty, affecting the engine's fuel injection. If not repaired in time, it could clog the exhaust or even cause the engine to stall midway, which is quite dangerous. Looking back now, addressing these symptoms early saved me a lot on fuel costs and time. I recommend everyone pay more attention to dashboard warning lights and driving sensations.
