how to fix P0302 misfire code on my Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts.
• Pull the ignition coil straight out and inspect it for cracks or carbon tracking.
• Remove the spark plug using a socket wrench and inspect it for wear or damage.
• Replace the spark plug if necessary, ensuring it is gapped to manufacturer specifications (0.028-0.032 inches).
• Reinstall the ignition coil and torque to factory specifications (typically around 15 Nm or 11 lb-ft).

3. Test and Replace Ignition Coil (if necessary)

• If the spark plug is fine, test the ignition coil using a multimeter to check for proper resistance.
• If the coil is faulty, replace it with a new one.
• Reconnect the ignition coil and secure it in place.

4. Inspect and Replace Fuel Injector (if required)

• Disconnect the fuel injector connector and remove the fuel rail if necessary.
• Remove the fuel injector from cylinder 2 using the appropriate tool.
• Check for clogs or issues with the injector.
• Replace the fuel injector with a new one if needed, ensuring it is seated properly in the fuel rail.

5. Perform Compression Test

• Reinstall the spark plug temporarily to perform a compression test.
• Use a compression gauge and crank the engine until the gauge stabilizes.
• Compare the reading to manufacturer specifications (usually between 120-180 psi).
• If the compression is low, further investigation into internal engine components may be necessary.