what does it mean when my Ford F-150 shows P0302 code

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Disconnect the ignition coil connector on cylinder 2.
• Remove the ignition coil using a socket wrench.
• Remove the spark plug with a spark plug socket.
• Inspect the spark plug for wear; if worn, replace it with a new one (specifications: heat range and gap per manufacturer).
• Reinstall the new spark plug and torque to the manufacturer’s specification (typically 13-20 lb-ft).

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug is fine, inspect the ignition coil for cracks or damage.
• Test the ignition coil with a multimeter; replace if it does not meet specifications.
• Install the new ignition coil and reconnect the harness.

4. Inspect Fuel Injector

• Disconnect the fuel injector connector on cylinder 2.
• Remove the fuel rail if necessary to access the fuel injector.
• Test the injector for proper function using a noid light or multimeter.
• Clean or replace the fuel injector if it’s faulty.

5. Compression Test (if misfire persists)

• Remove spark plugs from the affected cylinder and adjacent cylinders.
• Insert a compression gauge into the cylinder 2 spark plug hole.
• Crank the engine and record the compression reading; compare with manufacturer specifications.
• If low, further investigation into the engine’s internal condition is needed.