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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the engine cover if necessary.
• Locate and remove the ignition coil from cylinder 1.
• Unscrew and remove the spark plug from cylinder 1 using the spark plug socket.
• Install a new spark plug, ensuring it is gapped correctly to manufacturer specifications (typically 0.052 inches).
• Torque the spark plug to the manufacturer-recommended value (usually around 13 lb-ft).
• Reattach the ignition coil ensuring it clicks into place.

3. Test and Replace Ignition Coil (if necessary)

• Tools Required: Multimeter
• Test the ignition coil for cylinder 1 using a multimeter to check for proper resistance.
• If the resistance is outside of the manufacturer’s specifications, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect all electrical connections.

4. Inspect Fuel Injector

• Tools Required: Fuel injector cleaning kit (if cleaning is necessary)
• If the spark plug and ignition coil are functioning properly, check the fuel injector in cylinder 1.
• Remove the fuel rail and injector for cylinder 1.
• Inspect the injector for clogs or damage; clean or replace as necessary.
• Reinstall the fuel injector and fuel rail securely.