how to handle the P0302 misfire code in my Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket.
• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the electrical connector from the ignition coil on cylinder 2.
  3. Using a socket, remove the ignition coil and inspect for damage.
  4. Replace the ignition coil if damaged, ensuring it matches OEM specifications.
  5. Remove the spark plug from cylinder 2 using a spark plug socket.
  6. Inspect the spark plug for wear; replace if necessary (gap to manufacturer specifications).
  7. Reinstall the new or inspected ignition coil and reconnect the electrical connector.

3. Test and Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, torque wrench.
• Sub-steps:
  1. Disconnect the fuel line and electrical connector from the fuel injector on cylinder 2.
  2. Remove the injector using the fuel injector removal tool.
  3. Inspect the injector for clogs and functionality; clean or replace as needed.
  4. Reinstall the injector, ensuring it is seated correctly, and reconnect the fuel line and electrical connector.

4. Perform Compression Test

• Tools Required: Compression gauge.
• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression gauge into the spark plug hole.
  3. Crank the engine for several seconds and record the compression reading.
  4. Compare the reading to manufacturer specifications; replace the piston rings or valves if compression is low.

5. Reconnect and Recheck System

• Reconnect the negative battery terminal.
• Clear the error codes using the OBD-II scanner.
• Start the engine and allow it to reach operating temperature.