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

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.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter
• Fuel injector cleaner (if necessary)

2. Replace Spark Plug

1. Remove Engine Cover: Use a socket set to remove any fasteners securing the engine cover.
2. Disconnect Ignition Coil: Unplug the electrical connector from the ignition coil on cylinder 2.
3. Remove Ignition Coil: Unscrew the ignition coil using the socket set and carefully 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 the new spark plug and tighten it to the manufacturer’s specification (typically around 22 lb-ft or follow the manufacturer’s manual).
6. Reinstall Ignition Coil: Place the ignition coil back into position and secure it with the screws. Reconnect the electrical connector.
7. Reattach Engine Cover.

3. Replace Ignition Coil (if needed)

1. Swap Ignition Coil: If the misfire did not resolve after replacing the spark plug, swap the ignition coil from cylinder 2 with another cylinder (e.g., cylinder 1).
2. Test Misfire: Clear the code and run the engine to see if the P0302 code returns to cylinder 2. If it does, the ignition coil may need to be replaced.

4. Clean or Replace Fuel Injector (if needed)

1. Access Fuel Injector: Remove the intake manifold if required to access the fuel injector for cylinder 2.
2. Remove Fuel Injector: Disconnect the fuel line and electrical connector, then unscrew the injector from its mounting.
3. Clean or Replace Injector: Clean the injector with a fuel injector cleaner or replace it with a new one.
4. Reinstall Injector: Secure the injector back into its place, reconnect the fuel line, and electrical connector.