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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Replace Spark Plug and Ignition Coil

1. Remove Engine Cover (if applicable)
   • Use a socket set to remove any bolts securing the engine cover.
2. Remove Ignition Coil
   • Disconnect the electrical connector from the ignition coil.
   • Remove the mounting bolts using a socket set and gently pull the ignition coil out.
3. Replace Spark Plug
   • Use a spark plug socket and ratchet to remove the spark plug from cylinder 4.
   • Inspect the old spark plug for wear; replace it with a new one, ensuring it is gapped correctly (usually 0.028-0.032 inches).
4. Install New Ignition Coil
   • Place the new ignition coil in position and secure it with mounting bolts.
   • Reconnect the electrical connector to the ignition coil.

3. Test Fuel Injector

1. Inspect Fuel Injector
   • Check the fuel injector for any visible signs of damage or leaks.
   • If needed, replace the fuel injector with a new one.
2. Reconnect Fuel Line
   • Ensure that the fuel line is securely connected to the injector.

4. Reassemble and Reconnect

• Reinstall the engine cover if it was removed.
• Reconnect the battery negative terminal.