Description
Common Problems
The C123EF0 fault code is a common issue in Audi vehicles. When this happens, the ABS warning light appears on the dashboard. The traction control light may also turn on. Drivers often see the message: ‘Brake system fault stop carefully.’
This fault stops the ABS system from working, which means emergency braking is not available. As a result, the car relies only on standard braking. This increases safety risks, especially during emergencies or in bad weather. Fixing the issue quickly keeps the car safe to drive and avoids further problems.
Common Affected Part Numbers
This fault is often linked to these part numbers:
4K0907379P, 4K0 907 379 P, 0265956621.
