how to troubleshoot C0090 code in my Volvo XC60 Second Generation (2018-2024)

Learn how to troubleshoot and fix C0090 code related to brake stability control in Volvo XC60 (2018-2024). Step-by-step guide with diagnostic procedures.

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench, and safety glasses.
• Ensure the vehicle is on a level surface and securely elevated using jack stands if needed.

2. Inspect Wheel Speed Sensors

• Sub-step 1: Remove the wheel and tire to access the wheel speed sensor.
• Sub-step 2: Disconnect the electrical connector from the wheel speed sensor.
• Sub-step 3: Clean the area around the sensor to prevent debris from entering.
• Sub-step 4: Visually inspect the sensor for cracks or damage.
• Sub-step 5: If damaged, replace the wheel speed sensor with a new one.

3. Check Wiring Harness

• Sub-step 1: Inspect the wiring harness from the wheel speed sensor to the ABS module for physical damage.
• Sub-step 2: Use a multimeter to check for continuity in the wires.
• Sub-step 3: Repair or replace any damaged wiring as needed.
• Sub-step 4: Ensure all connectors are secure and free of corrosion.

4. Test Wheel Speed Sensor

• Sub-step 1: Reconnect the wheel speed sensor.
• Sub-step 2: Use a multimeter to measure the resistance across the sensor terminals; it should typically be within the manufacturer’s specified range (refer to service manual for exact values).
• Sub-step 3: If the readings are out of spec, replace the wheel speed sensor.

5. Reassemble and Clear Codes

• Sub-step 1: Reinstall the wheel and tire, ensuring lug nuts are torqued to manufacturer specifications.
• Sub-step 2: Reconnect the battery if it was disconnected.
• Sub-step 3: Use the OBD-II scanner to clear the C0090 code.
• Sub-step 4: Perform a test drive to ensure the issue is resolved.