how to fix P0300 code on my Ford Explorer Sixth Generation (2020-present)?

Solution

1. Preparation

• Gather tools and parts for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Ignition Components

• Remove the engine cover if applicable.
• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Remove the ignition coil connector and bolt.
  2. Pull the ignition coil out of the cylinder head.
  3. Inspect the spark plug; if worn or fouled, replace it.
  4. Install the new spark plug (torque to 13 lb-ft).
  5. Reinstall the ignition coil and secure it with the bolt.
  6. Reconnect the ignition coil connector.

3. Check and Replace Fuel Injectors (if needed)

• Tools Required: Fuel pressure gauge, injector puller tool.
• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "On" position (without starting the engine) to check fuel pressure.
  3. If pressure is low, check the fuel pump and filter.
  4. If injectors are faulty, disconnect the fuel rail and remove the injectors using the injector puller tool.
  5. Install new injectors and ensure they are seated properly.
  6. Reinstall the fuel rail and reconnect all connections.

4. Inspect for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine to identify leaks, or spray carburetor cleaner around suspected areas while the engine is running to check for changes in RPM.
  3. Replace any damaged hoses and ensure all connections are secure.

5. Clean MAF Sensor and Throttle Body

• Tools Required: MAF cleaner, throttle body cleaner.
• Sub-steps:
  1. Disconnect the MAF sensor and clean it with MAF cleaner.
  2. Remove the air intake hose to access the throttle body.
  3. Spray throttle body cleaner onto a clean cloth and wipe the throttle body until clean.
  4. Reconnect the air intake hose and MAF sensor.