how to diagnose the P0302 code on my Volkswagen Golf Seventh Generation (2013-2020)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety during the repair process.
• Allow the engine to cool down if it has been running.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 2 by unscrewing its mounting bolts.
• Carefully pull out the spark plug using a spark plug socket. Inspect for signs of fouling or wear.
• Install the new spark plug into cylinder 2, tightening it to the manufacturer's specified torque (usually around 22 lb-ft).
• Apply dielectric grease to the spark plug boot before reattaching the ignition coil.

3. Check and Replace Ignition Coil (if necessary)

• Remove the ignition coil from cylinder 2 as described previously.
• Use a multimeter to test the ignition coil for resistance; compare values with the manufacturer's specifications.
• If out of spec, replace the ignition coil with a new one. Ensure it is seated properly and reattach the plug connector.

4. Inspect and Test Fuel Injector

• Remove the fuel injector from cylinder 2 by disconnecting the electrical connector and unscrewing it from the rail.
• Use a noid light to confirm that the injector is receiving the correct signal.
• If the injector is faulty, replace it with a new one and ensure proper sealing upon reinstallation.

5. Perform Compression Test

• If misfire persists, conduct a compression test on cylinder 2.
• If compression is low, further investigation (valve issues, head gasket failure) may be necessary.