how to fix P0301 misfire code in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down if it has been running.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connector from cylinder 1.
3. Unbolt and remove the ignition coil using a socket wrench.
4. Use a spark plug socket to remove the spark plug from cylinder 1.
5. Inspect the new spark plug for correct gap (refer to manufacturer specifications).
6. Install the new spark plug and torque it to the manufacturer’s specifications (typically around 22 lb-ft).
7. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

1. If the ignition coil showed signs of damage during inspection, replace it.
2. Install the new ignition coil in cylinder 1 and reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

1. If fuel injector issues are suspected, remove the fuel rail.
2. Disconnect the fuel lines and relive the fuel pressure using a pressure gauge.
3. Remove the fuel injector from cylinder 1.
4. Clean the injector using a professional cleaning kit or replace it if necessary.
5. Reinstall the fuel injector and reassemble the fuel rail.

5. Inspect for Vacuum Leaks

1. Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
2. Replace any damaged hoses as necessary.
3. Perform a smoke test to confirm no leaks are present.