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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 2 by unbolting and disconnecting the wiring harness.
• Remove the old spark plug using a spark plug socket and ratchet.
• Install the new spark plug by hand to prevent cross-threading, then torque to the manufacturer's specification (typically 15-20 Nm).
• Reinstall the ignition coil and reconnect the wiring harness.

3. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil was found faulty, remove it from the cylinder after the spark plug replacement.
• Install the new ignition coil, ensuring it is seated properly.
• Torque the bolts to the manufacturer's specification (usually around 8-10 Nm).

4. Fuel Injector Inspection and Cleaning

• Tools Required: Fuel injector cleaning kit (if cleaning), or replacement injectors if necessary.
• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel rail (if applicable) to access the injector.
• Inspect the injector for clogs or damage; clean using a fuel injector cleaning kit or replace if necessary.
• Reinstall the fuel injector and reconnect the connector.

5. Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2 and attach the compression tester.
• Crank the engine and observe the compression reading; it should be within the manufacturer’s specified range (usually around 140-200 psi).
• If compression is low, further internal engine diagnostics may be needed.