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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connector on cylinder 2.
  3. Remove the ignition coil bolt and carefully extract the ignition coil from the spark plug.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear; replace with a new spark plug if necessary (specifications: gap around 0.028-0.032 inches).
  6. Reinstall the spark plug and ignition coil, ensuring they are properly seated and torqued to manufacturer specifications (typically around 15 ft-lbs for the coil).

3. Inspect and Replace Ignition Coil (If Necessary)

• Sub-steps:
  1. If the ignition coil is found faulty during inspection, replace it with a new one.
  2. Reconnect the ignition coil connector and ensure it clicks into place.
  3. Reinstall any components removed during the inspection.

4. Check and Clean Fuel Injector

• Sub-steps:
  1. Use an injector cleaner or replace the fuel injector for cylinder 2 if it’s clogged or malfunctioning.
  2. Disconnect the fuel line and electrical connector from the injector.
  3. Remove the faulty injector using appropriate tools.
  4. Install the new fuel injector, ensuring it is properly seated.
  5. Reconnect the fuel line and electrical connector.

5. Reassemble and Recheck

• Sub-steps:
  1. Reattach any engine covers or components removed during disassembly.
  2. Reconnect the negative battery terminal.
  3. Start the engine and check for any misfire codes.