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

Solution

1. Preparation

• Gather tools and parts.
• Ensure the vehicle is parked on a level surface.
• Disconnect the battery to prevent electrical shock.

2. Replace Spark Plug

• Locate the spark plug for cylinder 1 (usually near the front of the engine).
• Remove the ignition coil by unbolting it and disconnecting the electrical connector.
• Use a spark plug socket and ratchet to remove the old spark plug.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug, hand-tighten, then torque to manufacturer specifications (usually around 13 lb-ft).
• Reinstall the ignition coil and connect the electrical connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil is faulty, remove it from cylinder 1.
• Install the new ignition coil, ensuring it clicks into place.
• Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector from cylinder 1 (may require removing the fuel rail).
• Clean the injector using a specialized injector cleaner.
• Reinstall the fuel injector, ensuring a proper seal.

5. Conduct Compression Test

• If misfire persists, perform a compression test on cylinder 1.
• If compression is below specifications (usually around 150 psi), further investigation into the engine's mechanical condition is necessary.

Tools Required:

• OBD-II scanner
• Socket set
• Ratchet and spark plug socket
• Torque wrench
• Multimeter
• Compression tester
• Noid light (for fuel injector testing)

Parts Required:

• Spark plug (specific to Ford Explorer)
• Ignition coil (if faulty)
• Fuel injector (if necessary)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow the engine to cool before removing components to avoid burns.