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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the spark plug wire or coil connector from cylinder 1.
• Use the spark plug socket to unscrew and remove the spark plug.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug by hand to avoid cross-threading, then torque to the manufacturer's specification (usually around 13-15 lb-ft).
• Apply dielectric grease to the boot of the spark plug wire or coil.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil mounting screws and lift the coil out of the cylinder head.
• Disconnect the electrical connector from the ignition coil.
• Install the new ignition coil by reversing the removal steps, ensuring it is seated properly.
• Torque the mounting screws to the manufacturer's specification (typically around 7-10 lb-ft).

4. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Fuel line disconnect tool, socket set.
• Disconnect the fuel injector electrical connector.
• Use the fuel line disconnect tool to relieve fuel pressure and disconnect the fuel line from the injector.
• Remove the fuel injector mounting bolts and pull the injector out.
• Install the new injector and ensure it is properly seated; reconnect the fuel line and electrical connector.