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

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 2 by unscrewing it and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket; inspect for wear or fouling.
• Install a new spark plug, applying dielectric grease to the threads, and torque to the manufacturer's specification (typically 13-15 lb-ft).
• Reinstall the ignition coil, ensuring the connector is securely attached.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil shows signs of damage, remove it from cylinder 2.
• Install the new ignition coil and torque to the manufacturer’s specifications (usually around 7-10 lb-ft).
• Reconnect the electrical connector.

4. Inspect/Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set, O-rings, cleaner.
• Disconnect the fuel line and electrical connector from the fuel injector on cylinder 2.
• Remove the fuel injector using a fuel injector removal tool.
• Inspect the injector for clogs; clean or replace it if necessary, ensuring to replace O-rings.
• Reinstall the injector, reconnect the fuel line and electrical connector.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• Use a smoke machine to introduce smoke into the intake system to identify leaks, or spray carburetor cleaner around vacuum lines while the engine is running to observe changes in idle.
• Repair any leaks found in vacuum lines or seals.