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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the spark plug wire or ignition coil from cylinder 1.
• Use the spark plug socket to remove the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If needed, replace it with a new spark plug, ensuring it matches the manufacturer’s specifications. Torque to the manufacturer's specification (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts.
• Check the ignition coil with a multimeter to ensure it is within the manufacturer's specifications.
• If faulty, replace the ignition coil with a new one, ensuring proper connection and secure mounting.

4. Test Fuel Injector

• Tools Required: Fuel injector tester or multimeter.
• Disconnect the electrical connector from the fuel injector for cylinder 1.
• Test the injector for proper resistance using a multimeter; refer to specifications for resistance range.
• If the injector is faulty, replace it with a new injector, ensuring it is seated correctly.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading. Compare with specifications (typically around 120-160 PSI).
• If readings are low, further investigation into piston rings or valves may be necessary.

6. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• With the engine running, use a smoke machine to check for any vacuum leaks around the intake manifold.
• Alternatively, spray carburetor cleaner around suspected areas and listen for any changes in engine RPM.
• Repair any identified leaks by replacing gaskets or hoses as needed.