Volkswagen Passat B8 (2015-2022) ABS light is on how do I fix it

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the ignition is off.
• Disconnect the battery to prevent electrical shorts.

2. Scan and Reset Codes

• Use an OBD-II scanner to read and record any ABS-related trouble codes.
• Clear the trouble codes and see if the ABS light returns after a test drive.

3. Inspect and Clean Wheel Speed Sensors

• Tools Required: Socket set, cleaning brush, and electrical cleaner.
• Remove the wheel to access the wheel speed sensors.
• Clean the sensors and mounting surfaces with an electrical cleaner.
• Reinstall the sensors and torque to manufacturer specifications.

4. Inspect Wiring and Connectors

• Check all wiring harnesses and connectors associated with the ABS system.
• Repair any damaged wires or replace any corroded connectors as necessary.

5. Check Brake Fluid Level

• Open the master cylinder reservoir cap.
• Inspect the brake fluid level; top off with manufacturer-recommended fluid if low.
• If fluid is contaminated, flush the brake system and replace with fresh brake fluid.

6. Reconnect Battery and Test

• Reconnect the battery.
• Start the vehicle and check if the ABS light is still illuminated.
• Perform a test drive to ensure the ABS functions correctly.