how to fix P0301 code on my Ford Mustang S550 (2015-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 1:
  1. Unplug the electrical connector.
  2. Remove the bolts securing the coil and lift it out.
• Remove the spark plug:
  1. Use the spark plug socket to unscrew and remove the spark plug.
• Inspect the spark plug for fouling or damage. If worn, replace it with a new one.
• Torque the new spark plug to the manufacturer's specification (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil:
  1. If faulty, replace with a new coil.
  2. Reinstall the coil and reconnect the electrical connector.

4. Check Fuel Injector

• If the issue persists, inspect the fuel injector for cylinder 1:
  1. Remove the fuel rail if necessary.
  2. Test the injector for proper operation using a multimeter.
  3. Clean or replace the injector if it is clogged or defective.

5. Compression Test

• If misfire persists, perform a compression test:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester and crank the engine.
  3. Compare the reading to factory specifications. If low, further engine diagnostics may be required.