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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the ignition coil from cylinder 1:
  • Unplug the electrical connector from the ignition coil.
  • Unscrew the bolts securing the coil and remove it.
• Remove the spark plug:
  • Use the spark plug socket to unscrew and remove the old spark plug.
• Install the new spark plug:
  • Apply anti-seize lubricant to the threads of the new spark plug (if recommended).
  • Torque the spark plug to the manufacturer’s specification (typically around 13-15 lb-ft).
• Reinstall the ignition coil:
  • Position the coil over the spark plug and secure it with bolts.
  • Reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil is found to be faulty during inspection:
  • Remove the old ignition coil as described above.
  • Install the new ignition coil:
    • Position the new coil in place and secure it with bolts.
    • Reconnect the electrical connector.

4. Check Fuel Injector

• If the fuel injector is suspected to be faulty:
  • Use a multimeter to check the resistance of the injector.
  • If the resistance is outside the manufacturer’s specifications, replace the fuel injector.
  • Follow similar steps as above to remove and install the new injector.

5. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code.
• Start the engine and perform a test drive to ensure the issue is resolved.