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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Unscrew and remove the spark plug for cylinder 1 using a spark plug socket.
• Inspect the old spark plug for wear or damage (e.g., carbon buildup, gap issues).
• Install a new spark plug of the specified type for the vehicle, ensuring it is gapped correctly (usually 0.028-0.032 inches).
• Torque the spark plug to the manufacturer's specifications (typically around 15 lb-ft).

3. Check and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil.
• Unscrew and remove the ignition coil for cylinder 1.
• Inspect the ignition coil for signs of wear or damage.
• Install a new ignition coil, ensuring it fits snugly into the spark plug well.
• Reconnect the electrical connector and ensure it clicks into place.

4. Inspect and Test Fuel Injector

• Disconnect the fuel injector electrical connector for cylinder 1.
• Remove the fuel injector retaining clip and gently pull the injector out.
• Inspect the injector for clogs or damage.
• If necessary, replace with a new fuel injector, ensuring proper seating and connection.

5. Perform Compression Test

• Reinstall the spark plug and ignition coil temporarily after testing.
• Use a compression gauge to check cylinder 1 compression.
• Record the reading and compare it to manufacturer specifications (typically 120-200 psi).
• If compression is below specifications, further mechanical inspection may be required.