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

Solution

1. Preparation

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

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, ratchet, spark plug socket, dielectric grease.
• Remove the engine cover if applicable.
• Locate the ignition coil for cylinder 2 (refer to the owner's manual for location).
• Unplug the ignition coil connector and remove the mounting bolts using a socket set.
• Carefully pull out the ignition coil and inspect for cracks or wear.
• If damaged, replace with a new ignition coil.
• Check the spark plug in cylinder 2 using a spark plug socket; if worn or fouled, replace it with a new spark plug, ensuring the correct gap (usually around 0.028 inches for VW).
• Apply dielectric grease to the ignition coil connector before reinstallation.

3. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, multimeter, socket set.
• Disconnect the fuel injector connector for cylinder 2.
• Using a multimeter, check for the injector's resistance; if out of specification, replace the injector.
• If the injector is functional, clean it using a fuel injector cleaning kit.
• Reconnect the injector and ensure all connections are secure.

4. Compression Test (if necessary)

• Tools Required: Compression tester, socket set.
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine for a few seconds.
• Record the compression reading; it should be within the manufacturer’s specifications (usually around 150-200 psi).
• If the compression is low, investigate further for head gasket issues or valve problems.

5. Reassemble and Reconnect

• Reinstall the ignition coil and spark plug, tightening to manufacturer specifications (typically around 15 Nm).
• Replace any removed engine covers and reconnect the battery.