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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Raise the vehicle and secure it on jack stands if needed.

2. Inspect Ignition Components

• Tools Required: Socket set, torque wrench, ignition coil puller (if needed).
• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil in cylinder 1.
• Remove the ignition coil bolt and gently pull the ignition coil out.
• Inspect the coil for cracks, carbon tracking, or other damage. Replace if necessary.

3. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage. Replace with an OEM or equivalent spark plug.
• Torque the new spark plug to the manufacturer’s specifications (usually around 13-15 lb-ft).

4. Check and Replace Fuel Injector

• Tools Required: Fuel line tool, socket set.
• Disconnect the fuel line from the fuel injector.
• Unclip the electrical connector from the fuel injector.
• Remove the fuel injector retaining clip and carefully pull the injector out.
• Inspect the injector for clogs or damage. Replace if necessary.
• Install the new injector, ensuring it seats properly, and reattach the clip and connector.

5. Reassemble and Test

• Reconnect the ignition coil and secure it with the bolt.
• Reconnect the battery and start the engine.
• Clear the P0301 code using the OBD-II scanner and take the vehicle for a test drive.