how to address Ford F-150 14th Generation (2021-2024) check engine light with P0302 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety during repairs.

2. Inspect and Replace Spark Plug

• Remove the ignition coil for cylinder 2 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for wear, deposits, or damage; replace it if necessary with a new spark plug that meets OEM specifications (typically Motorcraft SP-534).
• Reinstall the spark plug and torque it to the manufacturer’s specification (usually around 13-15 lb-ft).

3. Test and Replace Ignition Coil

• Check the ignition coil for cylinder 2 using a multimeter to measure resistance. If the resistance is outside the specified range, replace the ignition coil with a new OEM part.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect and Replace Fuel Injector

• If the ignition coil is functional, test the fuel injector for cylinder 2 using a noid light to check for electrical signals.
• If the injector is not functioning, remove it from the fuel rail by detaching the fuel line and unscrewing the retaining clips.
• Install a new fuel injector that matches OEM specifications.
• Reattach the fuel line and secure the injector in place.

5. Verify Engine Compression

• If misfire symptoms persist, perform a compression test on cylinder 2. If compression is low, further investigation may be needed for potential engine damage (e.g., valve, piston rings).