how to fix P0302 code on my Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil harness from the coil on cylinder 2.
  3. Unscrew the ignition coil and remove it from the spark plug.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for signs of wear or fouling; replace if necessary.
  6. Install the new spark plug, torque to manufacturer specifications (typically 13-15 lb-ft).
  7. Reinstall the ignition coil and reconnect the harness.

3. Check and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is in good condition, test the ignition coil using a multimeter.
  2. If the coil is faulty, remove it and replace it with a new one.
  3. Ensure the new ignition coil is securely fastened and the connector is reattached.

4. Inspect and Replace Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector harness from the injector on cylinder 2.
  2. Remove the fuel rail if necessary to access the injector.
  3. Replace the fuel injector with a new one, ensuring it is seated properly.
  4. Reconnect the fuel injector harness and reassemble the fuel rail.

5. Perform a Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 2 again for access.
  2. Insert a compression gauge into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare the reading to manufacturer specifications; if low, further investigation is needed.

6. Recheck and Clear Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Start the engine and use the OBD-II scanner to clear the P0302 code.
  3. Monitor the engine for any reoccurrence of the misfire.