how to fix P0304 misfire code in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, anti-seize compound.
• Remove the ignition coil by unscrewing the bolts and disconnecting the electrical connector.
• Take out the spark plug using the spark plug socket.
  • Inspect the spark plug for wear or damage. If it appears worn, replace it.
  • Use anti-seize compound on the threads of the new spark plug.
• Install the new spark plug and torque it to the manufacturer’s specifications (typically around 22 ft-lbs).

3. Replace Ignition Coil

• If the spark plug is fine, check the ignition coil.
• Disconnect the ignition coil connector and remove the ignition coil.
• Install a new ignition coil and reconnect the electrical connector.
• Ensure it is seated properly and secured.

4. Check for Vacuum Leaks

• Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• If any leaks are found, replace the damaged hoses.

5. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0304 code.
• Test drive the vehicle to see if the check engine light comes back on and confirm that the misfire has been resolved.