what could cause a P0302 code in my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Use a socket and ratchet to remove the spark plug from cylinder 2.
  • Tools Required: Socket set, torque wrench, spark plug socket.
• Inspect the old spark plug for wear; replace with a new spark plug.
• Torque the spark plug to the manufacturer's specification (typically around 15-20 ft-lbs).
• Reinstall the engine cover.

3. Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove the ignition coil by unscrewing the retaining bolts.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the electrical connector.

4. Inspect/Replace Fuel Injector (if necessary)

• Disconnect the fuel injector connector for cylinder 2.
• Remove the injector retaining clips and pull the injector out.
  • Tools Required: Pliers, fuel line disconnect tool.
• Clean or replace the fuel injector as needed.
• Reinstall the injector and reconnect the electrical connector.

5. Perform Compression Test (if misfire persists)

• Remove the spark plugs from all cylinders.
• Insert the compression gauge into cylinder 2.
• Crank the engine and record the compression reading.
• Compare with the manufacturer's specifications; replace if necessary.