how can I fix the P0301 code on my Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaner.
• 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

• Remove the ignition coil from cylinder 1 using a socket set.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, oil fouling, or carbon buildup. Replace if necessary.
• Install a new spark plug, ensuring it is gapped correctly (typically 0.044 inches for Ford engines).
• Reattach the ignition coil securely.

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug is fine, test the ignition coil using a multimeter. Check for primary and secondary resistance.
• If the coil is faulty, remove it and replace it with a new one. Ensure it is seated properly.

4. Inspect and Clean or Replace Fuel Injector

• If the ignition components are functioning, check the fuel injector for cylinder 1.
• Disconnect the fuel injector connector and inspect for damage.
• Use a fuel injector cleaner or replace the injector if it is clogged or not functioning.

5. Compression Test

• If misfire persists, perform a compression test on cylinder 1.
• If readings are below specifications (typically around 150 psi), further investigation into valve or piston issues may be required.

6. Reassemble and Test

• Reconnect any components that were removed and ensure all connections are secure.
• Reconnect the negative battery terminal.
• Clear the codes from the OBD-II scanner.