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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shock.

2. Replace Ignition Coil

• Tools Required: Socket set, torque wrench, ratchet, pliers.
• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the electrical connector from the ignition coil on cylinder 1.
  3. Remove the bolt(s) securing the ignition coil using a socket.
  4. Pull the ignition coil out of the spark plug well.
  5. Install the new ignition coil by reversing the removal steps and ensuring a secure fit.

3. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench.
• Sub-steps:
  1. Remove the ignition coil (if not already done).
  2. Use a spark plug socket to remove the old spark plug from cylinder 1.
  3. Check the gap on the new spark plug and adjust it to the manufacturer's specifications.
  4. Install the new spark plug and tighten to the specified torque.
  5. Reinstall the ignition coil over the new spark plug.

4. Check Fuel Injector

• Tools Required: Multimeter (if testing resistance), fuel injector cleaner (if necessary).
• Sub-steps:
  1. Test the fuel injector for cylinder 1 by measuring resistance with a multimeter; compare with specifications.
  2. If the injector is faulty, disconnect the fuel line and remove the fuel rail to access the injector.
  3. Replace the fuel injector with a new one and reconnect the fuel line and rail.
  4. Reconnect any electrical connectors.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and check for any unusual noises or check engine lights.
• Clear the P0301 code using the OBD-II scanner and take the vehicle for a test drive to confirm the fix.