how to fix P0302 code on Volkswagen Golf MK7.5 (2020-Present)

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 if it has been running.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap gauge.
• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil and inspect it for damage.
• Use a socket to remove the spark plug from cylinder 2.
• Inspect the spark plug for wear; replace if necessary.
• Check and adjust the gap of the new spark plug to manufacturer specifications.
• Install the new spark plug and torque it to the specified value (typically around 22 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the ignition coil is found faulty during inspection:
• Tools Required: Socket set.
• Remove the ignition coil from cylinder 2.
• Install a new ignition coil, ensuring it is seated correctly.
• Reconnect the electrical connector.

4. Inspect Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit (if cleaning is needed).
• Disconnect the fuel injector connector for cylinder 2.
• Perform a fuel injector balance test or swap the injector with another cylinder to see if misfire follows.
• If faulty, replace the fuel injector with a new one.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine and note the compression reading.
• Compare the reading to manufacturer specifications. If low, further investigation into valve or piston issues may be needed.