how to fix P0301 cylinder 1 misfire in Skoda Octavia NFL (2020-Present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaning kit.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shocks.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Locate the spark plug for cylinder 1.
  3. Use a socket wrench to remove the old spark plug.
  4. Inspect the spark plug for wear; replace it if necessary.
  5. Apply anti-seize lubricant on the threads of the new spark plug.
  6. Install the new spark plug and torque it to the manufacturer's specifications (typically 18-22 lb-ft).
  7. Reattach the ignition coil.

3. Check and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. Remove the ignition coil for cylinder 1 by disconnecting the electrical connector and unscrewing it.
  2. Inspect the coil for cracks or burn marks.
  3. If defective, replace it with a new coil.
  4. Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel line and electrical connector from the fuel injector.
  2. Use a fuel injector cleaning kit to clean the injector.
  3. If cleaning does not resolve the issue, replace the fuel injector with a new one.
  4. Reconnect the fuel line and electrical connector securely.

5. Perform Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine several times and record the compression reading.
  4. Compare the reading with manufacturer specifications (typically 120-200 psi).
  5. If compression is low, further diagnostics are required to check for internal engine issues.

6. Final Assembly

• Reinstall any components removed during the repair process.
• Reconnect the negative battery terminal.