why is my Skoda Octavia’s ABS light on and how to fix it

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle's battery to prevent electrical shock or short circuits.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.

2. Inspect Wheel Speed Sensors

• Sub-steps:
  • Locate the wheel speed sensors at each wheel hub.
  • Remove any debris or dirt from the sensors and connectors.
  • Check the wiring harness for damage or loose connections.
• Tools Required: Socket set, cleaning cloth.

3. Replace Faulty Wheel Speed Sensors (if necessary)

• Sub-steps:
  • Use a socket wrench to remove the faulty wheel speed sensor.
  • Install the new sensor in reverse order and secure it with the appropriate torque.
  • Reconnect the electrical connector.
• Tools Required: Torque wrench, socket set.
• Parts Required: New wheel speed sensors (if identified as faulty).

4. Inspect and Repair ABS Control Module

• Sub-steps:
  • Locate the ABS control module, often found near the brake master cylinder.
  • Check for corrosion or loose connections at the module.
  • If the module is faulty, remove it by unscrewing the mounting bolts and disconnecting the wiring harness.
  • Install a new ABS control module and reconnect the wiring.
• Tools Required: Socket set, screwdriver.
• Parts Required: New ABS control module (if necessary).

5. Refill Brake Fluid and Bleed Brakes

• Sub-steps:
  • Check brake fluid level in the reservoir and add fluid as necessary.
  • Bleed the brake system using a brake bleeder to remove any air from the lines.
• Tools Required: Brake bleeder kit, wrench.
• Parts Required: Brake fluid (if needed).

6. Reconnect Battery and Clear Codes

• Reconnect the battery and use the ABS scanner to clear any stored error codes.
• Start the vehicle and verify that the ABS light is no longer illuminated.