how to fix P0301 misfire code Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Replace Spark Plug

• Remove the ignition coil cover if applicable.
• Using a socket and ratchet, carefully remove the spark plug from cylinder 1.
• Inspect the old spark plug for wear; replace it with a new spark plug that meets OEM specifications (typically NGK or Bosch).
• Torque the new spark plug to the manufacturer-recommended specification (usually 22 lb-ft).

3. Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil in cylinder 1.
• Remove the mounting bolt using a socket and ratchet.
• Carefully pull the ignition coil out of the spark plug well.
• Install the new ignition coil, ensuring it is seated correctly, and reattach the mounting bolt (torque to specification).
• Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• If fuel delivery was found to be an issue, detach the fuel rail after relieving fuel pressure.
• Remove the old fuel injector from cylinder 1 by pulling it out of the rail.
• Install the new fuel injector, ensuring it is seated properly in the intake manifold.
• Reassemble the fuel rail, reattach all connectors, and check for leaks.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and let it idle to ensure smooth operation.
• Monitor for any reoccurring engine codes using the OBD-II scanner.