my Volkswagen Tiguan has a check engine light with code P0302 what's wrong

Solution

1. Preparation

• Gather tools and required parts.
• Disconnect the negative battery terminal to ensure safety while working on the electrical components.

2. Inspect and Replace Spark Plug

• Tools Required: Ratchet, socket set, spark plug gap tool.
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolt and disconnecting the electrical connector.
• Remove the spark plug from cylinder 2 using a spark plug socket.
• Inspect the spark plug for fouling, wear, or carbon buildup. Replace if necessary.
• Ensure the new spark plug is gapped correctly according to manufacturer specifications.
• Reinstall the spark plug and ignition coil, securing them properly.

3. Inspect and Replace Ignition Coil

• Tools Required: Ratchet, socket set.
• If the ignition coil appears damaged during inspection, remove it and replace with a new one.
• Reconnect the electrical connector and secure it in place.

4. Test Fuel Injector

• Tools Required: Fuel injector tester or noid light.
• Disconnect the fuel injector connector for cylinder 2.
• Connect the fuel injector tester or noid light to check if the injector is receiving the proper signal.
• If the injector is faulty, replace it with a new one.

5. Verify Compression

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2 and install the compression tester.
• Crank the engine and record the compression reading. It should meet manufacturer specifications.
• If compression is low, further investigation may be required to check for internal engine problems.