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

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connector from the spark plug.
  3. Remove the ignition coil using a socket wrench.
  4. Use a spark plug socket to remove the spark plug from cylinder 1.
  5. Inspect the old spark plug for wear and replace it with a new one.
  6. Torque the new spark plug to the manufacturer's specification (typically around 13-15 lb-ft).
  7. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug replacement did not resolve the issue, remove the ignition coil from cylinder 1.
  2. Inspect the ignition coil for cracks or carbon tracking.
  3. Replace with a new ignition coil if damaged.
  4. Reinstall the ignition coil and reconnect the wiring harness.

4. Check Fuel Injector

• Sub-steps:
  1. Remove the fuel rail to access the fuel injector for cylinder 1.
  2. Inspect the injector for clogs or leaks.
  3. Replace the fuel injector if it is not functioning properly.
  4. Reinstall the fuel rail and ensure all connections are secure.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 1.
  2. Insert a compression gauge into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare with manufacturer's specifications (usually around 120-150 psi).
  5. If the compression is low, further diagnosis of the cylinder may be needed.