how to fix the P0301 code in my Ford Mustang S650 (2024-Present)

Solution

1. Preparation

• Gather tools and materials needed for repair.
• Ensure the vehicle is parked on a flat surface, engine cooled, and battery disconnected.

Tools Required:

• OBD-II scanner
• Spark plug socket
• Torque wrench
• Compression tester
• Fuel injector cleaning kit (if necessary)
• Basic hand tools (sockets, wrenches)

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector from the cylinder 1 ignition coil.
3. Remove the ignition coil from cylinder 1 by unbolting it.
4. Use a spark plug socket to remove the spark plug from cylinder 1.
5. Inspect the spark plug for damage or fouling. Replace with a new OEM spark plug if needed.
6. Torque the new spark plug to the manufacturer's specification (typically around 13-15 lb-ft).
7. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil

1. If the spark plug replacement did not resolve the issue, proceed to inspect the ignition coil.
2. Test the ignition coil's resistance using a multimeter (refer to the service manual for specifications).
3. If faulty, replace the ignition coil with a new OEM part.
4. Reinstall the ignition coil onto cylinder 1, ensuring it is properly seated and bolted down.

4. Test Fuel Injector

1. If misfire persists, check the fuel injector for cylinder 1.
2. Perform a fuel injector balance test to determine if it is functioning correctly.
3. If injector is clogged or faulty, clean or replace the injector as necessary.
4. Reinstall the fuel injector and ensure proper connections.

5. Perform Compression Test

1. Attach the compression tester to the spark plug hole of cylinder 1.
2. Crank the engine several times and record the compression reading.
3. Compare the reading to the manufacturer's specifications.
4. If compression is low, investigate potential mechanical issues (valve problems, head gasket leaks, etc.).