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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before beginning work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease
• Remove the ignition coil from cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
• Unscrew and remove the spark plug using a spark plug socket.
• Inspect the old spark plug and clean the area around the spark plug hole.
• Install the new spark plug and torque it to the manufacturer’s specification (usually around 25-30 Nm).
• Apply a small amount of dielectric grease to the ignition coil boot before reinstallation.

3. Replace Ignition Coil

• Tools Required: Socket set
• If the ignition coil is faulty, remove the old ignition coil from cylinder 2.
• Install the new ignition coil and ensure it clicks into place.
• Reconnect the electrical connector securely.

4. Test Fuel Injector

• Tools Required: Fuel injector tester
• Disconnect the fuel injector connector for cylinder 2.
• Connect the fuel injector tester according to the manufacturer's instructions.
• Activate the tester to see if the injector is functioning properly. If it does not operate, replace the fuel injector.

5. Check Compression

• Tools Required: Compression tester
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine a few times and record the compression reading.
• Compare with specifications in the service manual. If compression is low, further investigation is needed for potential engine repairs.