how to fix P0302 misfire code in Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before proceeding.

2. Replace Spark Plug

1. Remove Engine Cover: Use a socket set to unbolt and remove the engine cover.
2. Disconnect Ignition Coil: Unplug the wiring harness from the ignition coil on cylinder 2.
3. Remove Ignition Coil: Unscrew the ignition coil and pull it out.
4. Remove Spark Plug: Use a spark plug socket to unscrew and remove the spark plug from cylinder 2.
5. Install New Spark Plug: Insert a new spark plug, ensuring it is properly gapped to manufacturer specifications. Tighten to the recommended torque (typically around 25 Nm).

3. Replace Ignition Coil (if necessary)

1. Inspect Old Ignition Coil: If swapping did not resolve the misfire, replace the ignition coil.
2. Install New Ignition Coil: Place the new ignition coil into the cylinder and secure it with bolts.
3. Reconnect Wiring Harness: Firmly plug the wiring harness back into the ignition coil.

4. Inspect and Clean Fuel Injector

1. Access Fuel Injector: Remove any necessary components to gain access to the fuel injector.
2. Disconnect Fuel Injector: Unplug the fuel injector wiring harness.
3. Remove Fuel Injector: Unscrew and pull out the fuel injector from cylinder 2.
4. Clean or Replace Injector: Clean the injector with a specialized cleaner or replace it with a new one.
5. Reinstall Fuel Injector: Insert the cleaned or new injector and secure it.

5. Reassemble and Test

1. Reattach Engine Cover: Place the engine cover back and secure it.
2. Reconnect Battery: Reconnect the battery terminals.
3. Clear Codes: Use the OBD-II scanner to clear the P0302 code.
4. Test Drive Vehicle: Monitor for any reoccurrence of the misfire.