how to fix P0302 misfire code in Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

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

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Locate the spark plug for cylinder 2.
• Use a spark plug socket to remove the old spark plug.
• Inspect the spark plug socket for debris; clean if necessary.
• Install a new spark plug, ensuring it is gapped correctly to manufacturer specifications (typically around 0.030 inches).
• Torque the spark plug to the manufacturer's specified torque (usually around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil above cylinder 2.
• Remove the coil mounting bolt using a socket wrench.
• Pull the ignition coil straight out of the spark plug well.
• Install a new ignition coil, ensuring it is seated properly.
• Reattach the mounting bolt and torque it to the manufacturer's specifications (usually around 8-12 lb-ft).
• Reconnect the electrical connector.

4. Clean or Replace Fuel Injector

• Locate the fuel injector for cylinder 2.
• Disconnect the electrical connector and fuel line (be cautious of fuel spills; wear safety goggles).
• Remove any retaining clips or bolts securing the injector.
• If cleaning, use a fuel injector cleaner; otherwise, install a new injector.
• Reattach the fuel line and electrical connector securely.

5. Reassemble and Check

• Reinstall any components removed for access, including the engine cover.
• Reconnect the negative battery terminal.
• Start the engine and let it run for a few minutes.