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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaner.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
  2. Remove the spark plug using a spark plug socket. Inspect the plug for wear, carbon buildup, or damage.
  3. Replace with a new spark plug that meets manufacturer specifications (typically iridium or platinum).
  4. Reinstall the ignition coil and reconnect the electrical connector, ensuring it is seated properly.

3. Test and Replace Ignition Coil

• Sub-steps:
  1. Using a multimeter, check the resistance of the ignition coil for cylinder 1 against manufacturer specifications.
  2. If the ignition coil is faulty, remove it and replace it with a new one.
  3. Reconnect the ignition coil and ensure all connections are secure.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Remove the fuel injector from the intake manifold.
  3. Clean the injector using a fuel injector cleaner kit or replace it if it is clogged or malfunctioning.
  4. Reinstall the injector and reconnect the electrical connector.

5. Perform Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare the reading to manufacturer specifications; replace the head gasket or repair the engine if compression is low.

6. Check for Vacuum Leaks

• Sub-steps:
  1. Inspect all vacuum hoses around the intake manifold for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner around suspected areas to locate leaks.
  3. Repair or replace any damaged hoses or components.