how to reset my Volvo XC90 check engine light

Solution

1. Preparation

• Gather necessary tools: OBD-II scanner and a wrench.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Scan for Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port, typically located under the dashboard.
• Turn on the ignition to the "On" position without starting the engine.
• Follow the scanner’s instructions to read and record any trouble codes.

3. Clear Codes

• With the OBD-II scanner still connected, navigate to the option that allows you to erase or clear the trouble codes.
• Confirm the action when prompted, which will reset the check engine light.

4. Disconnect Battery (if necessary)

• If the OBD-II scanner does not clear the light, disconnect the negative terminal of the battery using a wrench.
• Wait for at least 5-10 minutes to allow the system to reset.
• Reconnect the negative terminal securely.

5. Start Engine

• Start the engine and monitor the dashboard for the check engine light.
• Observe for a few minutes to ensure the light does not come back on, indicating the issue was resolved.