how to fix the P0301 misfire code on my Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working.
• Allow the engine to cool if it has been running.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the spark plug from cylinder 1.
3. Inspect the old spark plug for wear; replace if necessary.
4. Gap the new spark plug to manufacturer specifications (typically around 0.054 inches).
5. Install the new spark plug and torque it to the manufacturer’s specifications (usually around 12-15 lb-ft).

3. Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil on cylinder 1.
2. Remove the mounting bolt(s) securing the ignition coil.
3. Replace the old ignition coil with a new one, ensuring it is seated properly.
4. Reconnect the electrical connector securely.

4. Check and Clean Fuel Injector

1. Disconnect the fuel injector connector on cylinder 1.
2. Remove the fuel rail (if necessary) to access the fuel injector.
3. Inspect the injector for clogs; clean it using a fuel injector cleaning solution if needed.
4. Reinstall the injector and ensure it is properly seated.

5. Reassemble and Reconnect

1. Reattach any engine covers or components that were removed.
2. Reconnect the negative battery terminal.
3. Start the engine and allow it to idle to check for any misfires.