how to fix P0301 misfire code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather the necessary tools and safety equipment.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool before working on any components.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts.
• Pull the ignition coil straight out to avoid damage.
• Unscrew the old spark plug using a spark plug socket.
• Inspect the new spark plug to ensure it meets OEM specifications (gap, heat range).
• Apply a small amount of dielectric grease to the spark plug threads and install it.
• Torque the new spark plug to the manufacturer's specifications (typically around 20 Nm).
• Reinstall the ignition coil ensuring it clicks into place and secure with bolts.

3. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil appears damaged during inspection, replace it.
• Remove the old ignition coil and install the new one, securing it with the appropriate torque.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector cleaning kit or replacement injector.
• Disconnect the fuel line and electrical connector from the injector.
• Remove the injector from the fuel rail.
• Clean the injector with a cleaning solution or replace it if it is faulty.
• Reinstall the injector and ensure a proper seal.

5. Reconnect Battery

• Reconnect the negative battery terminal.
• Clear the codes using an OBD-II scanner.