**Tools Needed:**
- OBD-II scanner or code reader (compatible with Land Rover vehicles)
**Procedure:**
1. **Ensure the Issue is Resolved:** Before resetting the check engine light, it's crucial to address the underlying issue that triggered the warning in the first place. Diagnose and fix the problem, whether it's a malfunctioning sensor, emission-related issue, or another problem.
2. **Locate the OBD-II Port:** The OBD-II port in the Discovery II is typically located beneath the dashboard on the driver's side, near the steering column. It may be necessary to access it from the driver's footwell.
3. **Turn Off the Ignition:** Ensure that the vehicle's ignition is turned off before connecting the OBD-II scanner.
4. **Plug in the OBD-II Scanner:** Connect the OBD-II scanner's cable or connector to the OBD-II port in the Discovery II.
5. **Turn On the Ignition (Key in the "On" Position):** Without starting the engine, turn the ignition key to the "On" position. This should activate the vehicle's electrical systems and allow the OBD-II scanner to communicate with the vehicle's ECM.
6. **Navigate the Scanner's Menu:** Follow the instructions provided with your specific OBD-II scanner to navigate through the menu options. Most scanners will have a "Clear Codes" or "Erase Codes" option to reset the check engine light.
7. **Reset the Check Engine Light:** Select the "Clear Codes" or "Erase Codes" option on the scanner. The scanner will communicate with the vehicle's ECM and clear the stored diagnostic trouble codes (DTCs).
8. **Verify the Reset:** After clearing the codes, check that the check engine light on the dashboard has turned off.
9. **Disconnect the Scanner:** After resetting the check engine light, disconnect the OBD-II scanner from the vehicle's OBD-II port.
10. **Turn Off the Ignition:** Turn off the ignition key.
11. **Test Drive:** Take a test drive to ensure that the check engine light remains off and that the vehicle is running smoothly.
Please note that resetting the check engine light without addressing the underlying issue is a temporary solution. If the problem that triggered the warning light is not fixed, the light may illuminate again in the future. It's essential to diagnose and repair the root cause of the issue to ensure the vehicle's proper operation and compliance with emissions standards.
Additionally, some states and regions have specific regulations regarding emissions-related warning lights. Be sure to comply with local emissions testing and inspection requirements when addressing check engine light issues on your Discovery II.
