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

Solution

1. Preparation

• Gather tools and parts required for repair.
• Ensure the engine is cool and disconnect the battery.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter
• Fuel injector cleaning kit (if needed)

2. Replace Spark Plug

• Step 1: Remove the engine cover (if applicable).
• Step 2: Disconnect ignition coil connector on cylinder 1.
• Step 3: Unscrew the ignition coil and remove it.
• Step 4: Remove the old spark plug using a spark plug socket.
• Step 5: Inspect the spark plug hole for debris and clean if necessary.
• Step 6: Install the new spark plug and torque to manufacturer specifications (typically 13-15 lb-ft).
• Step 7: Reinstall the ignition coil and connector.

3. Replace Ignition Coil (if necessary)

• Step 1: If the ignition coil was swapped in diagnostic steps and the misfire persisted, replace with a new coil.
• Step 2: Disconnect the old ignition coil and remove it.
• Step 3: Install the new ignition coil and reconnect the connector.

4. Clean or Replace Fuel Injector (if necessary)

• Step 1: If injector performance was poor, clean using a fuel injector cleaning kit or replace the injector.
• Step 2: Disconnect fuel lines and electrical connectors from the injector.
• Step 3: Remove the old injector and install the new or cleaned injector.
• Step 4: Reconnect fuel lines and electrical connectors.

5. Check Compression (if necessary)

• Step 1: If compression is low on cylinder 1, further investigation is needed (valve issues, head gasket, etc.).
• Step 2: Conduct a wet compression test to check for piston ring failure.