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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical shock.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2.
  • Tools Required: Socket set, ratchet.
• Remove the spark plug using a spark plug socket.
  • Tools Required: Spark plug socket, ratchet.
• Install a new spark plug, ensuring it is gapped correctly (typically 0.054 inches for the Ford F-150).
• Reattach the ignition coil.

3. Test Ignition Coil

• Swap the ignition coil from cylinder 2 with another cylinder (e.g., cylinder 1).
• Clear the codes with the OBD-II scanner.
• Start the engine and monitor for any misfire codes.
• If the misfire follows the ignition coil, replace it.

4. Inspect Fuel Injector

• Remove the fuel injector from cylinder 2.
  • Tools Required: Fuel line disconnect tool, socket set.
• Inspect the injector for clogs or damage.
• If necessary, replace the fuel injector with a new one.
• Reinstall the fuel injector and reconnect the fuel line.

5. Check Compression

• Perform a compression test on cylinder 2 using a compression gauge.
• Record the reading and compare it to the manufacturer's specifications (typically around 150 PSI).
• If compression is low, further investigation into engine internals may be necessary.