how to fix P0301 code in Ford Mustang S550 (2015-2023)

Solution

1. Preparation

• Gather the necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool
• Remove the ignition coil from cylinder 1 by unscrewing any retaining bolts and disconnecting the electrical connector.
• Remove the spark plug from cylinder 1 using a spark plug socket.
• Inspect the old spark plug; if it is damaged or fouled, install a new spark plug with the correct gap as specified in the owner's manual.
• Reinstall the spark plug, tightening it to the manufacturer's torque specification (usually around 13-20 ft-lbs).
• Reattach the ignition coil and secure it with bolts.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set
• If the ignition coil is found to be defective during inspection, remove it from cylinder 1.
• Install the new ignition coil, ensuring it clicks into place.
• Reconnect the electrical connector securely.

4. Test Fuel Injector

• Tools Required: Fuel pressure gauge, injector tester (if available)
• Connect a fuel pressure gauge to the fuel rail and check for proper fuel pressure.
• If pressure is low, inspect the fuel pump and filter.
• Test the fuel injector using an injector tester to ensure it is delivering the correct amount of fuel.
• Replace the injector if it is malfunctioning.

5. Compression Test

• Tools Required: Compression gauge
• Remove the spark plug and ignition coil from cylinder 1.
• Insert the compression gauge into the spark plug hole and crank the engine for a few revolutions.
• Record the compression reading. Compare it to the manufacturer's specifications.
• If the compression is low, further diagnostic procedures are required to identify internal engine issues.