This indicator lamp lights up. What could be the cause of this?

The indicator lamp depicted is commonly associated with tire pressure monitoring. When this light activates, it indicates potential issues with tire inflation. The correct options include:

1. A low inflation pressure in one tire: This is important because driving with under-inflated tires can lead to poor handling, increased tire wear, and higher fuel consumption.

2. A recently performed wheel change: After changing wheels, there can sometimes be a need for recalibrating the tire pressure monitoring system, which might trigger the indicator if not properly addressed.

Option 3, a loose wheel nut, while a critical safety concern, is not typically indicated by this specific light.

In German traffic regulations, maintaining proper tire pressure is essential for safety and efficiency, making it important to address issues indicated by this lamp promptly.