how to fix P0302 misfire code in Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover (if applicable) to access ignition components.
• Disconnect the wiring harness from the ignition coil for cylinder 2.
• Remove the ignition coil using a socket and ratchet.
• Inspect the spark plug for wear, cracking, or fouling. Replace if necessary.
• Install a new spark plug (torque to manufacturer specifications, typically around 22 lb-ft).
• Apply dielectric grease to the ignition coil boot and install the ignition coil back into place.
• Reconnect the wiring harness.

3. Check and Replace Fuel Injector

• Tools Required: Fuel line disconnect tool, socket set, torque wrench.
• Remove the fuel rail (if necessary) to access the injector for cylinder 2.
• Disconnect the fuel supply line and return line from the fuel rail.
• Remove the fuel rail bolts and carefully lift the rail to access the injectors.
• Remove the fuel injector for cylinder 2 and inspect for clogs or damage.
• Install the new fuel injector, ensuring it's seated correctly and secured.
• Reinstall the fuel rail and reconnect fuel lines, torquing bolts to manufacturer specifications.

4. Perform Compression Test

• Tools Required: Compression tester.
• Remove spark plugs from all cylinders.
• Insert the compression tester into the spark plug hole of cylinder 2.
• Crank the engine and record the compression reading.
• Compare the reading to manufacturer specifications to ensure cylinder health.

5. Final Checks

• Reconnect the negative terminal of the battery.
• Start the engine and check for smooth operation.