my Ford Mustang S650 (2024-Present) has a check engine light and a P0301 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery negative terminal to ensure safety.
• Allow the engine to cool if it has been running.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1:
  1. Unscrew the retaining bolts and gently pull the coil off the spark plug.
• Remove the spark plug:
  1. Use the spark plug socket to unscrew and remove the old spark plug.
• Inspect the spark plug for wear or carbon buildup.
• Install a new spark plug:
  1. Apply anti-seize compound on the threads of the new plug.
  2. Hand-tighten the spark plug, then use a torque wrench to tighten it to the manufacturer’s specification (usually around 13-15 lb-ft).
• Reinstall the ignition coil and secure it with the retaining bolts.

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, test or replace the ignition coil:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the ignition coil from the engine.
  3. Install the new ignition coil and reconnect the electrical connector.

4. Inspect and Replace Fuel Injector

• If the misfire persists, check the fuel injector for cylinder 1:
  1. Disconnect the electrical connector and fuel line from the injector.
  2. Remove the fuel injector from the intake manifold.
  3. Clean or replace the injector as necessary.
  4. Reinstall the injector and reconnect the fuel line and electrical connector.

5. Final Checks

• Reconnect the battery negative terminal.
• Clear the check engine light using the OBD-II scanner.
• Start the engine and check for any further codes.