how to fix P0302 code on my Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to prevent electrical shocks.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Noid light
• Multimeter

2. Replace Spark Plug and Ignition Coil

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate cylinder 2's spark plug and ignition coil.
  3. Disconnect the ignition coil connector.
  4. Remove the ignition coil using a socket.
  5. Remove the spark plug with a spark plug socket.
  6. Install a new spark plug (ensure it is gapped correctly per manufacturer specifications).
  7. Install the new ignition coil and reconnect the connector.

3. Test and Replace Fuel Injector (if needed)

• Sub-steps:
  1. Connect the noid light to the fuel injector connector for cylinder 2 and crank the engine to check for pulse.
  2. If no pulse is detected, inspect the wiring and replace the injector if necessary.
  3. To replace, remove the fuel rail (if required), disconnect the fuel line, and remove the injector.
  4. Install the new injector, ensuring proper seating and reconnecting the fuel line.

4. Conduct Compression Test (if misfires persist)

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare with the manufacturer's specifications (typically between 120-180 psi).
  5. If low, inspect for valve issues or internal engine problems.