how to resolve P0302 misfire code on Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety while working.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Steps:
  1. Remove the engine cover (if applicable) to access the spark plugs.
  2. Disconnect the ignition coil connector from the ignition coil on cylinder 2.
  3. Remove the bolt securing the ignition coil using a socket.
  4. Carefully pull out the ignition coil.
  5. Remove the spark plug using a spark plug socket.
  6. Inspect the old spark plug for signs of wear or damage.
  7. Install the new spark plug by hand to avoid cross-threading, then torque to the manufacturer’s specifications (generally around 13 lb-ft).
  8. Reinstall the ignition coil and reconnect the connector.

3. Check and Replace Ignition Coil (if necessary)

• Tools Required: Socket set
• Steps:
  1. If the ignition coil was found faulty during diagnostics, replace it.
  2. Remove the old ignition coil as per the previous steps.
  3. Install the new ignition coil and secure it with the bolt.
  4. Reconnect the ignition coil connector.

4. Inspect/Replace Fuel Injector (if necessary)

• Tools Required: Fuel line removal tool, socket set
• Steps:
  1. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
  2. Disconnect the fuel lines to the injector using a fuel line removal tool.
  3. Remove the fuel injector retaining clips and pull out the injector.
  4. Inspect the injector for clogs or damage; replace if necessary.
  5. Install the new injector and reconnect the fuel lines.

5. Reassemble and Connect Battery

• Reinstall any components that were removed, such as the engine cover.
• Reconnect the negative battery terminal.