how to fix P0301 misfire code in my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Use a socket wrench to remove the spark plug from cylinder 1.
• Inspect the old spark plug for wear (e.g., electrode condition, gap).
• Install a new spark plug, ensuring it is gapped to the manufacturer specifications (usually around 0.028-0.032 inches).
• Torque the spark plug to the manufacturer's specified value (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the mounting bolts securing the ignition coil and lift it out.
• Inspect the coil for cracks or signs of damage.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the electrical connector.

4. Test Fuel Injector

• Remove the fuel injector for cylinder 1 using the appropriate tool.
• Inspect the injector for clogs and clean it if necessary or replace it if damaged.
• Reinstall the fuel injector, ensuring proper seating and connection.

5. Perform a Compression Test

• Attach the compression gauge to the spark plug hole of cylinder 1.
• Crank the engine and record the compression reading.
• Compare the reading to the manufacturer's specifications (usually around 120-180 psi).
• If compression is low, further investigation of the internal engine components may be necessary.