why does my Ford Explorer's check engine light keep coming on

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety during the repair.

2. Replace Faulty Spark Plugs

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connectors.
3. Remove the ignition coils by unscrewing them from the engine.
4. Use a spark plug socket to remove the old spark plugs.
5. Inspect the new spark plugs for the correct gap and install them into the engine.
6. Reinstall the ignition coils and reconnect the connectors.

3. Inspect and Replace Air Filter

1. Locate the air filter housing and release any clips or screws.
2. Remove the old air filter and inspect the housing for dirt or debris.
3. Install a new air filter, ensuring it is seated properly.
4. Reassemble the air filter housing securely.

4. Check and Replace Gas Cap

1. Inspect the gas cap for cracks or damage.
2. If necessary, replace the gas cap with a new one ensuring it is the correct type for the model.
3. Tighten the gas cap until it clicks to ensure a proper seal.

5. Test Drive and Reset Check Engine Light

1. Reconnect the negative battery terminal.
2. Start the engine and check for any remaining error codes using the OBD-II scanner.
3. Take the vehicle for a test drive to confirm that the check engine light remains off.

Tools Required:

• OBD-II scanner
• Socket set
• Spark plug socket
• Torque wrench (if necessary for spark plugs)
• Screwdriver set

Parts Required:

• Spark plugs
• Ignition coils (if faulty)
• Air filter
• Gas cap (if faulty)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical components.
• Allow the engine to cool before inspecting or removing parts.