Audi ABS Light ON Brake Problem

If your Audi ABS light stays on while driving it means there is a problem with the Anti-lock Brake System (ABS). If ABS light comes on it can also trigger the BRAKE, ESC or EDL lights to come on as well.

At a minimum, your Audi will not have ABS brakes but there may be other underlying problems as well. Under normal conditions, the ABS light will only come on for a couple of seconds when you turn on the ignition.

ABS turns off once the engine is started. It is normal for the light to flash a few times if the vehicle starts to slip during hard braking. In this guide, you will find instructions on how to troubleshoot ABS light on Audi vehicles such as A1 A3 A4 A5 A6 A7 Q3 Q5 Q7 TT.

audi abs brake light on 8P EV B6 B6 B7 B8 C4 C5 C8 C7 D2 D3 D4

Along with the ABS light, you may also see ESPESC (Electronic Stability Control), EDL (Electronic Differential Lock) and Brake light. If the problem is critical the BRAKE light will be flashing. In most cases, your brakes will still work but it may take longer to bring the vehicle to a stop especially in emergency situation.

If both ABS and BRAKE light stay on, the braking system may not function properly. Immediate attention is required if these two lights are both staying on. If your BRAKE warning light flashes on your instrument cluster do not operate the vehicle. Audi brakes may not work or functionality can be lost while driving. 

If your Audi ABS stays on the first thing you need to do is check the brake fluid level. Follow this guide to learn how to check Audi brake fluid level. If the brake fluid level is normal, next step is to read codes from the ABS module. 

Diagnose Audi ABS Light

To find out why your Audi ABS light is on, you need to read the codes from the ABS module. In order to this, you will need an Audi Level 2 OBD2 scanner that can read ABS fault codes. 

What you will need

Instructions

Park vehicle

Park your Audi in a safe area.

Audi parked to diagnose ABS light

 

Locate OBD-II Port

Locate OBD-2 port under the dashboard.

 

Connect scanner

Plug OBD-2 scanner into the OBD2 port of your Audi.

Read Audi ABS BRAKE light codes

 

Turn on ignition

Turn on the ignition. All Audi dashboard lights should turn on but do not start the engine. If your Audi has START/STOP button, press it twice without pressing on the brake pedal.

Turn on Audi to read erase ABS light

 

Turn on scanner

Allow your Audi ABS Scan Tool to connect to the Engine Control Unit (ECU). This may take a few seconds.

ABS light troulbeshooting Audi A1 A3 A4 A5 A6 A7 Q3 Q5 Q7 TT

 

Select ABS Menu

Select Audi from the menu. Next select the Anti-lock Brake System menu.

Select Audi

 

Read codes

Read codes from the ABS module.

Clear codes

After you fix the problem that was discovered in the previous step come back to the ABS menu and clear Audi ABS codes.

Audi ABS Problem

 

Audi ABS light can come on for various reasons. Common causes of Audi ABS light include defective or dirty wheel speed sensor, control module failure, bad clock spring, low brake fluid level, blown fuse, bad ABS Pump or Module, Electronic Differential Lock (EDL) problem, brake light switch defective.

Audi ABS light may come ON if there is a problem with the Electronic Differential Lock (EDL) as well.

ABS Light On Due to Control Module Failure

Control Module Failure is a common issue that often triggers Audi ABS light ON on models such as A4 and A6. To fix this problem you will need to replace the Control Module or rebuilt your existing module. You will need to remove your ABS module and ship it to a company of your choice that offers Audi Control Module Rebuilt Service

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