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

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, multimeter, compression gauge, and vacuum gauge.
• Disconnect the battery before starting repairs.
• Allow the engine to cool down.

2. Inspect and Replace Ignition Components

• Spark Plug Inspection
  1. Remove the spark plug from cylinder 2 using a socket wrench.
  2. Check for signs of wear, carbon buildup, or damage.
  3. If damaged, replace with an OEM spark plug (check gap specification).
• Ignition Coil Inspection
  1. Disconnect the ignition coil connector.
  2. Remove the ignition coil from cylinder 2.
  3. Test the coil using a multimeter to check for proper resistance (consult service manual for specifications).
  4. Replace the ignition coil if faulty.

3. Check Fuel Injector

1. Disconnect the fuel injector connector for cylinder 2.
2. Use a multimeter to test the injector for resistance (should be within manufacturer's specified range).
3. If the injector is faulty, replace it with a new one.

4. Vacuum Leak Inspection

1. Inspect vacuum hoses connected to the intake manifold for cracks or disconnections.
2. Use a smoke machine or carburetor cleaner to find any leaks around the intake manifold.
3. Repair or replace any damaged hoses or gaskets.

5. Compression Test

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 the manufacturer's specifications. If low, further diagnosis is required for internal engine issues.

6. Reassemble and Test

1. Reinstall all components in reverse order of removal.
2. Reconnect the battery.
3. Start the engine and monitor for any new codes or symptoms.