my Ford F-150 12th Generation (2009-2014) has a check engine light and code P0302

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Using a spark plug socket and ratchet, carefully remove the spark plug from cylinder 2.
• Inspect the spark plug for wear or damage. Replace if necessary with a new spark plug of the specified type (OEM recommended).
• Torque the new spark plug to the manufacturer’s specification (typically around 12-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolt and disconnecting the electrical connector.
• Inspect the coil for cracks or damage. If faulty, replace it with a new coil that matches OEM specifications.
• Reinstall the ignition coil and secure it using the retaining bolt. Ensure the electrical connector clicks into place.

4. Inspect Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check for injector pulse while cranking the engine. If no pulse, check wiring and replace the injector if defective.
• If the injector is faulty, remove it using an injector puller tool and replace it with a new one.

5. Verify Engine Compression

• Perform a compression test on cylinder 2 using a compression gauge.
• If compression is low, further investigation may be needed for potential engine repair (valve seals, head gasket, etc.).