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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Ignition Components

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector from the ignition coil for cylinder 2.
  3. Remove the ignition coil from cylinder 2 using a socket set.
  4. Inspect the spark plug for signs of damage or excessive wear; replace if necessary.
  5. Install a new or inspected ignition coil if the original is faulty.
  6. Reconnect the ignition coil connector.

3. Test and Replace Fuel Injector

• Sub-steps:
  1. Remove the fuel rail to access the fuel injector for cylinder 2.
  2. Disconnect the fuel injector connector and remove the injector from the intake manifold.
  3. Test the fuel injector using a noid light to ensure it is receiving proper signals.
  4. If the injector is faulty, replace it with a new one.
  5. Reinstall the fuel rail and reconnect the injector connector.

4. Perform Cylinder Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 2.
  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.
  5. Reinstall the spark plug after testing.

5. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear any stored codes.
  3. Start the engine and check for any new codes.