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

Solution

1. Preparation

• Gather necessary tools and parts.
• 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 ignition coil cover if necessary.
• Disconnect the ignition coil wiring harness from the coil on cylinder 1.
• Remove the ignition coil from cylinder 1.
• Remove the old spark plug with a spark plug socket.
• Inspect the spark plug for wear; replace with a new spark plug if necessary.
• Torque the new spark plug to manufacturer specifications (typically 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the wiring harness.

3. Check and Replace Ignition Coil

• Tools Required: Multimeter (to test), socket set
• Test the ignition coil for cylinder 1 using a multimeter to check for resistance (consult repair manual for specifications).
• If the coil is faulty, remove it and replace it with a new one.
• Reconnect the ignition coil wiring.

4. Inspect and Test Fuel Injector

• Tools Required: Fuel pressure gauge, injector test kit
• Check fuel pressure at the fuel rail using a fuel pressure gauge.
• Disconnect the fuel injector connector and use an injector test kit to test for proper operation.
• If the injector is defective, replace it with a new one.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1.
• Insert a compression tester into the spark plug hole.
• Crank the engine and note the compression reading.
• Compare to manufacturer specifications; if low, further inspection may be required.