how to fix P0301 misfire code in Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) to access the spark plug.
2. Use a spark plug socket to remove the old spark plug from cylinder 1.
3. Inspect the removed spark plug for signs of fouling or damage.
4. Gap the new spark plug to the manufacturer’s specifications (typically around 0.054 inches for Ford engines).
5. Install the new spark plug, tightening it to the torque specification (around 13 lb-ft).

3. Inspect and Replace Ignition Coil

1. Remove the ignition coil harness connector from the ignition coil on cylinder 1.
2. Unbolt the ignition coil using a socket wrench and remove it from the cylinder head.
3. Install the new ignition coil, ensuring it seats properly.
4. Reconnect the ignition coil harness connector.

4. Check and Replace Fuel Injector (if necessary)

1. Disconnect the fuel injector connector.
2. Remove the fuel rail (if required) to access the injector.
3. Pull out the old fuel injector and inspect the O-rings for damage.
4. Install the new fuel injector, ensuring the O-rings are lubricated and seated correctly.
5. Reattach the fuel rail and connectors.

5. Reassemble and Test

1. Reconnect the negative battery terminal.
2. Start the engine and let it idle to ensure smooth operation.
3. Clear any stored codes using an OBD-II scanner.
4. Take the vehicle for a test drive to confirm repair.