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

Solution

1. Preparation

• Gather tools and parts required. Disconnect the battery to ensure safety during the repair.
• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, vacuum gauge.
• Parts Required: Spark plug, ignition coil, fuel injector (if necessary), gaskets.

2. Inspect and Replace Ignition Components

• Remove Ignition Coil:
  • Disconnect the electrical connector from the ignition coil.
  • Remove the bolt securing the coil and pull it out.
• Replace Spark Plug:
  • Use a socket wrench to remove the spark plug from cylinder 2.
  • Inspect the spark plug for wear; replace it with a new one if necessary.
  • Torque the new spark plug to the manufacturer's specifications (typically around 13-15 lb-ft).
• Reinstall Ignition Coil:
  • Place the new or inspected ignition coil back into position.
  • Secure it with the bolt and reconnect the electrical connector.

3. Inspect and Replace Fuel Injector

• Remove Fuel Injector:
  • Relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
  • Disconnect the electrical connector from the fuel injector.
  • Remove the fuel rail if necessary to access the injector, then carefully extract it.
• Install New Fuel Injector:
  • Lubricate the O-ring of the new fuel injector with engine oil.
  • Insert the new injector into the rail or manifold and secure it.
  • Reconnect the electrical connector.

4. Verify Engine Health

• Perform a Compression Test:
  • Remove the spark plug from cylinder 2.
  • Insert the compression tester and crank the engine for a few seconds.
  • Note the compression reading; it should be within manufacturer specifications (usually around 120-160 psi).
• Check for Vacuum Leaks:
  • Use a vacuum gauge to check for consistent readings at idle.
  • Inspect hoses and intake manifold for any visible leaks.