how to fix P0300 code in Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plugs

• Remove the ignition coil cover (if applicable) using a socket set.
• Disconnect the electrical connector from each ignition coil.
• Remove the ignition coils using a ratchet and socket.
• Unscrew and remove the old spark plugs using a spark plug socket.
• Install new spark plugs, ensuring they are gapped according to manufacturer specifications (usually around 0.054 inches).
• Reinstall the ignition coils and reconnect the electrical connectors.

3. Inspect and Replace Ignition Coils (if necessary)

• If any ignition coils were found to be faulty during diagnostics, replace them.
• Remove the faulty ignition coil, and install the new coil, tightening to manufacturer specifications (usually around 10-15 lb-ft).
• Reconnect the electrical connectors.

4. Check and Replace Fuel Injectors (if necessary)

• If fuel pressure was low, check the fuel injectors.
• Remove the fuel rail after relieving fuel pressure by disconnecting the fuel pump relay and starting the engine until it stalls.
• Replace any faulty fuel injectors with new ones, ensuring proper seating and connection.

5. Inspect Vacuum Hoses and Gaskets

• Visually inspect all vacuum hoses connected to the intake manifold.
• Replace any damaged or cracked hoses.
• Check intake manifold gaskets for leaks and replace if necessary.