What causes the yellow exclamation mark light to illuminate in an Audi?

[LaHeidi]

Audi vehicles displaying a yellow exclamation mark light can indicate three possible scenarios: 1. A yellow triangle with an exclamation mark in the center: This is the traction control indicator, also known as the ground adhesion control system light. When illuminated, it alerts the driver to deactivate the traction control system. If the light remains constantly on, it signifies an issue with the traction control system. 2. A yellow bracket line with an exclamation mark in the center: This indicator represents the tire pressure monitoring system. Its illumination indicates insufficient tire pressure. 3. A yellow gear with an exclamation mark: This is the automatic transmission fault warning light, signaling either a transmission malfunction, transmission fluid level below normal range, or the need for fluid replacement.