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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug

1. Remove the engine cover if necessary using a socket set.
2. Disconnect the ignition coil connector for cylinder 2.
3. Remove the ignition coil by unbolting it and gently pulling it up.
4. Unscrew the spark plug using a spark plug socket and ratchet.
5. Inspect the old spark plug for wear and replace it with a new one, ensuring it is gapped correctly (typically 0.028-0.032 inches for the MK7).
6. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil (if necessary)

1. If the ignition coil is found to be faulty during inspection, replace it.
2. Ensure to install the new ignition coil securely and reconnect the electrical connector.

4. Check and Replace Fuel Injector (if needed)

1. If the fuel injector is faulty or clogged, remove the fuel rail assembly.
2. Disconnect the fuel lines and the electrical connector from the fuel injector in cylinder 2.
3. Remove the old injector and replace it with a new one, applying a small amount of engine oil to the O-ring for easier installation.
4. Reassemble the fuel rail and reconnect all fittings.

5. Perform Compression Test (if mechanical issues are suspected)

1. Remove the spark plug from cylinder 2.
2. Insert a compression gauge into the spark plug hole.
3. Crank the engine and record the compression reading.
4. Compare the reading to the manufacturer's specifications. If low, further investigation into engine internals is required.