how to fix the P0301 misfire code in my Ford Explorer Sixth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before working on components.

2. Inspect and Replace Spark Plug

1. Remove the ignition coil from cylinder 1:
   • Disconnect the electrical connector.
   • Remove the bolts securing the coil using a socket set.
2. Extract the spark plug:
   • Use a spark plug socket and ratchet to unscrew and remove the spark plug.
3. Inspect the spark plug:
   • Look for signs of wear, carbon buildup, or damage.
4. Install a new spark plug:
   • Apply anti-seize compound on the threads (optional).
   • Torque the new spark plug to the manufacturer’s specification (usually around 13-15 lb-ft).
5. Reinstall the ignition coil:
   • Secure the coil back in place and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

1. Remove the ignition coil from cylinder 1 as described in Step 2.
2. Test the coil with a multimeter:
   • Measure the primary and secondary resistance; consult the service manual for specifications.
3. If the coil is faulty, install a new ignition coil:
   • Position the new coil in place, secure it with bolts, and reconnect the electrical connector.

4. Inspect Fuel Injector (if necessary)

1. Remove the fuel rail (if required) to access the fuel injector for cylinder 1.
2. Check the injector for clogs or leaks:
   • Use a fuel injector cleaning kit if needed.
3. If the injector is faulty, replace it:
   • Remove the old injector, lubricate the O-rings of the new injector, and install it in place.

5. Perform Compression Test (if necessary)

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine and record the compression reading:
   • Compare to specifications; if low, further investigation of the engine internals may be needed.