how to fix P0302 misfire code on my Volkswagen Golf MK6 (2009-2014)

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, multimeter, socket set, torque wrench, compression tester, new spark plugs, new ignition coil (if applicable), and new fuel injector (if applicable).
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil by unscrewing the retaining bolts.
• Take out the old spark plug using a spark plug socket. Inspect for wear or fouling.
• Install the new spark plug, ensuring it is gapped correctly (typically 0.028-0.032 inches).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test/Replace Ignition Coil

• If the ignition coil was found faulty during diagnostics, replace it with a new unit.
• Follow the same procedure as above to remove and replace the ignition coil.
• Ensure connections are secure and check for proper fitment.

4. Test/Replace Fuel Injector

• If the fuel injector was determined to be malfunctioning, remove the fuel rail after relieving the fuel pressure.
• Disconnect the fuel line and electrical connector for the injector.
• Replace the faulty fuel injector with a new one, ensuring to lubricate the O-ring with clean engine oil before installation.
• Reassemble the fuel rail and reconnect all components.

5. Reassembly and Testing

• Reconnect the battery terminal.
• Start the engine and allow it to idle. Check for any abnormal noises or warning lights.
• Monitor the engine for smooth operation and absence of misfire symptoms.