how to fix P0301 code in Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Locate the spark plug for cylinder 1 (check owner's manual for exact location).
3. Use a ratchet and socket to remove the spark plug, then inspect it for wear or fouling.
4. If replacement is needed, apply anti-seize compound to the threads of the new spark plug.
5. Install the new spark plug and tighten it to the manufacturer’s specified torque (typically around 13-15 lb-ft).
6. Reconnect any components removed during the process.

3. Inspect and Replace Ignition Coil

1. Remove the ignition coil connector by pressing the tab and pulling it off.
2. Use a socket to remove the ignition coil mounting screws.
3. Carefully pull the ignition coil out of the spark plug hole.
4. Inspect the coil for cracks or damage; if faulty, replace it with a new one.
5. Reinstall the ignition coil and ensure it is secured with the screws.
6. Reconnect the ignition coil connector.

4. Test and Clean Fuel Injector

1. Access the fuel injector for cylinder 1 (may require removal of fuel rail).
2. Disconnect the fuel injector connector and unscrew the injector from the rail.
3. Use a multimeter to test the resistance of the injector to ensure it's within specifications (typically around 12-16 ohms).
4. If faulty, replace the injector. If it is functional, use a fuel injector cleaner to flush it.
5. Reinstall the injector and secure it before reconnecting the fuel line and electrical connector.

5. Compression Test

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole and crank the engine.
3. Note the compression reading and compare it to manufacturer specifications (usually between 120-180 psi).
4. If compression is low, further investigation for internal engine issues (valve problems, head gasket failure) is required.