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

Solution

1. Preparation

• Gather necessary tools and parts: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, replacement ignition coil, spark plug, and fuel injector cleaner.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Replace Ignition Coil

• Sub-steps:
  1. Disconnect the negative battery terminal to prevent electrical shock.
  2. Remove the engine cover if applicable.
  3. Locate the ignition coil for cylinder 2 (usually marked).
  4. Disconnect the electrical connector from the ignition coil.
  5. Remove the bolt securing the ignition coil using a socket set.
  6. Pull the ignition coil out of the spark plug well.
  7. Install the new ignition coil by reversing the removal steps, ensuring it is seated correctly. Torque the mounting bolt to the manufacturer's specifications (usually around 10 Nm).

3. Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil (as per previous step).
  2. Using a spark plug socket, remove the old spark plug.
  3. Inspect the spark plug for wear and replace if needed (use the manufacturer-recommended gap).
  4. Install the new spark plug, tightening to the recommended torque (typically 25 Nm).
  5. Reinstall the ignition coil.

4. Clean or Replace Fuel Injector

• Sub-steps:
  1. Disconnect the negative battery terminal again if previously reconnected.
  2. Remove the fuel rail (if required) to access the fuel injector for cylinder 2.
  3. Detach the electrical connector and fuel line from the injector.
  4. Remove the fuel injector by pulling it out of the fuel rail or engine.
  5. Clean the injector with fuel injector cleaner or replace it with a new one.
  6. Reinstall the injector, ensuring proper seating, and reconnect the fuel line and electrical connector.