Audi Brake System Fault – C123EF0 Brake Booster Failure

BRAKE SYSTEM FAULT STOP CAREFULLY - is a warning message often caused by an ABS pump malfunction for the later generation Audi’s which will also cause brake booster failure fault codes to be stored. Once triggered, the fault code C123EF0 - Hydraulic Brake Booster Limit Value Reached will cause the ABS warning light to become constantly illuminated, both of which will remain unclearable. We are seeing large numbers of these Bosch ABS units, across a range of Audi models, failing in this exact way. Common Failure symptoms: Brake warning on the dash: ‘Brake system fault stop carefully’ ABS warning light illuminated C123EF0 - Hydraulic Brake Booster Limit Value Reached If you have problems with your Audi ABS be sure to check out our link below: