how to fix P0302 misfire code on Ford F-150 12th Generation (2009-2014)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove Engine Cover: If applicable, remove the engine cover using a socket set.
• Access Spark Plug: Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove Spark Plug: Use a spark plug socket and ratchet to unscrew and remove the spark plug.
• Inspect Spark Plug: Check the spark plug for signs of wear or fouling. Replace it if necessary with a new spark plug that meets OEM specifications.
• Reinstall Spark Plug: Install the new spark plug and torque it to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Check Ignition Coil: Inspect the ignition coil for cracks or corrosion. If damaged, replace it.
• Install New Ignition Coil: Position the new ignition coil over the spark plug and secure it with the retaining bolts. Reconnect the electrical connector.

4. Test Fuel Injector

• Remove Fuel Injector: If injector issues are suspected, remove the fuel rail to access the injector for cylinder 2.
• Test Fuel Injector: Use a multimeter or noid light to check for proper electrical function.
• Replace Injector: If the injector is faulty, replace it with a new one, ensuring proper seating and securing.

5. Reassemble and Connect Battery

• Reinstall any components removed, such as the engine cover or fuel rail.
• Reconnect the negative battery terminal.