Method 1: Using the instrument cluster buttons (Most Common):
1. Turn the ignition ON (without starting the engine).
2. Locate the trip odometer button (usually a small button on the steering wheel or instrument cluster). It might be labeled "TRIP" or have a similar symbol.
3. Press and hold the trip odometer button. While holding it, you might need to cycle through the odometer readings.
4. Look for a specific sequence involving the odometer and possibly other displays. This varies by year and model. You might see oil can symbols, service messages, or specific numbers flash. Consult your owner's manual for precise instructions.
5. Once the correct sequence is displayed, release the button. The oil service light should reset.
6. Try starting the engine. The light should be off, but if not, repeat the process.
Method 2: Using a code reader:
Some advanced code readers can clear service lights, including the oil service light. These readers connect to your vehicle's OBD-II port (usually found under the dashboard). This method is more reliable but requires purchasing and using an OBD-II scanner. Follow the instructions provided with your specific code reader.
Method 3: Manual Reset (Less Common):
Some older vehicles required a manual reset via a combination of turning the ignition on and off multiple times with button presses. Your owner's manual will be your best source if this applies to your specific car.
Important Considerations:
* Consult your owner's manual: This is the *most crucial* step. Your owner's manual will provide the precise instructions for resetting the oil service light on your specific 2008 Ford Mondeo diesel model. The instructions above are general guidelines and may not apply exactly to your vehicle.
* Oil Change: Remember that resetting the oil service light doesn't replace the necessity of actually changing your oil. Follow your recommended oil change interval.
If you're unsure about any of these steps, it's best to consult a qualified mechanic to avoid any potential issues.
