how to fix P0301 misfire code in Ford Mustang S550 (2015-2023)

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the battery before starting any repair work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1.
  • Tools Required: Socket set, ratchet, extension
• Remove the spark plug using a spark plug socket.
  • Inspect for carbon buildup, wear, or damage.
• If damaged, replace the spark plug with a new one (ensure correct gap as per specifications).

3. Inspect and Replace Ignition Coil

• If the spark plug is fine, check the ignition coil for any signs of damage or corrosion.
• Swap the ignition coil with another cylinder (e.g., cylinder 2) to see if the misfire follows the coil.
• If the misfire moves to the other cylinder, replace the ignition coil for cylinder 1.

4. Fuel Injector Testing and Replacement

• Using a noid light, check the fuel injector signal to confirm it's receiving the correct signal.
• If the injector isn't firing, replace it with a new one.
  • Tools Required: Fuel injector puller (if necessary), socket set
• Reconnect the fuel injector and ensure all connections are secure.

5. Final Assembly and Reconnect

• Reinstall the ignition coil and spark plug in cylinder 1.
• Reconnect the battery terminal.
• Start the vehicle and allow it to reach operating temperature.