how to fix P0301 misfire code on Ford Explorer Sixth Generation (2020-present)

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 down if it has been running.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from cylinder 1.
• Remove the ignition coil bolt and gently pull the ignition coil out.
• Remove the spark plug using a spark plug socket and inspect it for wear or damage.
• Replace with a new spark plug if necessary, ensuring it is gapped correctly to manufacturer specifications (usually around 0.028-0.031 inches).
• Reinstall the ignition coil and reconnect the connector.

3. Test and Replace Ignition Coil (if necessary)

• Check the ignition coil resistance with a multimeter to ensure it is within manufacturer specifications (typically around 0.5-1.5 ohms for primary and 6-12 kOhms for secondary).
• If the coil is faulty, remove it and replace it with a new one.
• Reinstall the ignition coil onto the spark plug.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set.
• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel rail if necessary to access the injector.
• Remove the fuel injector and inspect it for blockage or damage.
• Replace with a new fuel injector if necessary.
• Reinstall the fuel rail and reconnect all electrical connectors.

5. Compression Test

• If misfire persists, perform a compression test on cylinder 1.
• Remove the spark plug and screw in the compression gauge.
• Crank the engine and record the compression reading.
• Compare with manufacturer specifications (typically around 150-200 PSI).
• If compression is low, further investigation into internal engine issues may be required.