1. Using the vehicle's onboard diagnostic system (OBD-II): This is the simplest method for many codes, particularly those related to temporary issues that the car has already resolved.
* The Key Cycle Method: This is the most common method, but its success rate varies depending on the code.
1. Turn the ignition key to the "ON" position (the position where the dash lights illuminate, but the engine doesn't start). *Do not start the engine.*
2. Wait for about 30 seconds. This allows the computer system to fully power up.
3. Turn the key to the "OFF" position.
4. Repeat steps 1-3 five or more times. Some people say three times is enough, but repeating it more often increases the likelihood of success.
5. Start the engine. The check engine light (or other warning light) should either be off or stay on. If it stays on, the problem persists, and you need further diagnostics.
* OBD-II Scanner: A more reliable method is using an OBD-II scanner. These are relatively inexpensive and widely available.
1. Plug the OBD-II scanner into the diagnostic port (usually located under the dashboard, often near the steering column).
2. Turn the ignition to the "ON" position.
3. Follow the scanner's instructions to clear the codes. This usually involves selecting an option like "Erase Codes" or "Clear DTCs."
4. Turn the ignition to the "OFF" position.
5. Start the engine.
2. Professional Diagnostics and Repair: If the check engine light remains on after trying the above methods, or if the problem causing the code returns, you *must* take your Fusion to a qualified mechanic or Ford dealership. Simply clearing the code without addressing the underlying issue is dangerous and could lead to further damage to your vehicle.
Important Considerations:
* Severity of the code: Some codes indicate serious problems that require immediate attention. Ignoring these can lead to significant damage or safety hazards.
* Recurring codes: If a code keeps coming back, there's an underlying mechanical or electrical problem that needs professional diagnosis and repair. Repeatedly clearing the code without fixing the problem will only mask the issue.
* Safety: Never attempt repairs beyond your skill level. Working on a car's electrical system can be dangerous if not done correctly.
In short, the key cycle method is a quick attempt, but an OBD-II scanner is more reliable. However, if the problem persists, professional help is crucial. Don't just keep resetting the codes; fix the problem causing them.
