my Volkswagen Golf MK6 (2009-2014) has a check engine light with code P0302, what does that mean?

Solution

1. Preparation

• Gather tools and materials.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool if it has recently been running.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil cover if necessary.
• Disconnect the ignition coil connector and remove the coil.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for signs of wear or damage; replace if necessary.
• Install a new spark plug, hand-tighten, then torque to manufacturer specifications (usually around 22 Nm).
• Reinstall the ignition coil and reconnect the connector.

3. Test and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil.
• Tools Required: Multimeter.
• Measure the primary and secondary resistance as per specifications.
• If the coil is faulty, replace it with a new one.
• Reconnect all components securely.

4. Inspect Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaner.
• Disconnect the fuel injector connector.
• Use a fuel pressure gauge to check fuel pressure at the rail.
• If pressure is low, check the fuel pump and filter.
• If the injector is clogged, use injector cleaner or replace it.