why does my Volvo XC90 stability control light keep coming on?

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the ignition is off.
• Gather necessary tools and replacement parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Clean Wheel Speed Sensors

• Locate the wheel speed sensors at each wheel hub.
• Remove any dirt or debris around the sensors using a soft cloth.
• If damaged, replace the sensors with new ones.
• Reconnect any wiring connectors and ensure they are secure.

3. Check Brake Fluid Level

• Open the hood and locate the brake fluid reservoir.
• Inspect the fluid level; it should be between the minimum and maximum marks.
• If low, add the recommended brake fluid type (DOT 4 for most Volvo models).
• Check for leaks around brake lines and connections.

4. Examine ABS Module

• Locate the ABS module, usually mounted near the brake master cylinder.
• Inspect for any visible leaks or damage.
• Connect the OBD-II scanner and check for any ABS-related fault codes.
• If faults are present, repair or replace the ABS module as necessary.

5. Battery Voltage Check

• Use a multimeter to check the battery voltage; it should be around 12.6 volts when the engine is off.
• If the voltage is low, recharge or replace the battery.
• Ensure battery terminals are clean and securely connected.