how to fix P0300 random misfire code in Ford Explorer Sixth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the engine cover if necessary.
• Disconnect the ignition coil connectors.
• Remove the ignition coils and inspect them for damage.
• Remove the spark plugs using the socket set, inspect for wear, and replace with OEM equivalent if necessary.
• Apply dielectric grease to the spark plug boots to prevent moisture ingress.
• Reinstall the ignition coils and connectors.
• Torque the spark plugs to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Check and Replace Ignition Coils

• Tools Required: Socket set, multimeter.
• Perform a resistance test on each ignition coil using a multimeter.
• If any coils are out of specification, replace them with OEM parts.
• Reinstall and reconnect the ignition coils.

4. Clean or Replace Fuel Injectors

• Tools Required: Fuel injector cleaning kit or replacement injectors.
• If cleaning, follow the instructions of the fuel injector cleaning kit to flush and clean the injectors.
• If replacing, remove the fuel rail and replace the fuel injectors, ensuring to lubricate O-rings with engine oil before installation.
• Reassemble the fuel rail and reconnect the fuel lines.

5. Inspect and Clean MAF Sensor

• Tools Required: MAF cleaner.
• Disconnect the MAF sensor connector.
• Remove the MAF sensor from the intake.
• Spray MAF cleaner on the sensor elements (do not touch them) and allow it to dry completely before reinstalling.