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

Solution

1. Preparation

• Gather tools and materials: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel pressure gauge, new spark plugs, ignition coil (if needed), and fuel injector cleaner.
• Ensure the vehicle is parked on a level surface, and the engine is cool.

2. Replace Spark Plug

• Sub-steps:
  1. Disconnect the negative battery terminal to prevent electrical shock.
  2. Remove the engine cover if applicable.
  3. Locate the spark plug for cylinder 1—usually at the front of the engine.
  4. Use a socket wrench to remove the spark plug, inspecting it for wear or damage.
  5. Install a new spark plug, tightening it to the manufacturer’s specified torque (typically around 13 lb-ft for a Ford Mustang).

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. Unplug the ignition coil connector for cylinder 1.
  2. Remove the mounting bolts securing the ignition coil and lift it out.
  3. Install the new ignition coil, securing it with bolts and reconnecting the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• Sub-steps:
  1. Disconnect the fuel injector connector.
  2. Remove the fuel rail if needed to access the injector.
  3. Inspect the fuel injector for clogs; clean with injector cleaner or replace if necessary.
  4. Reinstall the fuel rail and reconnect all electrical connections.

5. Reassemble and Test

• Sub-steps:
  1. Reconnect the battery terminal.
  2. Start the engine and let it idle; monitor for check engine light and smooth operation.
  3. Perform a test drive to ensure the issue is resolved.