how to resolve P0302 code on Volkswagen Golf MK5 (2004-2008)

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the negative terminal of the battery to ensure safety during repairs.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Disconnect the spark plug wire or ignition coil from cylinder 2.
• Using a spark plug socket, remove the spark plug from cylinder 2.
• Inspect the spark plug for signs of wear or fouling.
• Replace with a new spark plug of the correct specification (usually NGK or Bosch for VW).
• Reinstall the spark plug and reconnect the ignition coil/wire.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, proceed to check the ignition coil.
• Remove the ignition coil from cylinder 2.
• Test the ignition coil using a multimeter (check resistance according to manufacturer specs).
• If faulty, replace with a new ignition coil specific to the VW Golf MK5.
• Reinstall the ignition coil.

4. Inspect and Clean Fuel Injector

• If the issue persists, check the fuel injector for cylinder 2.
• Disconnect the fuel injector connector and remove the injector.
• Inspect for clogs or leaks. Clean using an injector cleaner or replace if necessary.
• Reinstall the fuel injector and reconnect the electrical connector.

5. Perform Compression Test

• If misfire continues, perform a compression test on cylinder 2.
• Remove spark plug and attach a compression tester.
• Crank the engine and record the compression reading.
• Compare with specifications; if low, further mechanical inspection may be needed.