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

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the ignition coil cover (if applicable).
• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the ignition coil using a socket set.
• Inspect the spark plug for wear or damage. If worn, replace it with a new spark plug that meets OEM specifications.
• Torque the new spark plug to the manufacturer's specified value (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the spark plug was not the issue, remove the ignition coil from cylinder 1.
• Inspect the ignition coil for cracks or signs of wear. If damaged, replace with a new ignition coil.
• Reinstall the ignition coil, ensuring it is seated properly, and reconnect the electrical connector.

4. Inspect Fuel Injector

• If issues persist, check the fuel injector for cylinder 1.
• Remove the fuel rail if necessary to access the injector.
• Inspect the injector for clogs or leaks.
• If faulty, replace the fuel injector with an OEM or equivalent part.
• Reinstall the fuel rail and secure it according to manufacturer specifications.

5. Perform Compression Test (if needed)

• If the misfire continues, conduct a compression test on cylinder 1.
• Remove the spark plug, insert a compression gauge, and crank the engine.
• Compare the compression reading to manufacturer specifications. If low, further internal engine inspection may be needed.