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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, screwdrivers.
• Disconnect the negative terminal of the battery to ensure safety during repairs.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Using a socket set, carefully remove the spark plug from cylinder 1.
  3. Inspect the spark plug for signs of wear or fouling.
  4. Install a new spark plug, ensuring the gap is set according to manufacturer specifications (typically around 0.7-0.8 mm).
  5. Torque the spark plug to the manufacturer’s specified value (usually around 25 Nm).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil on cylinder 1.
  2. Remove the ignition coil using a socket set.
  3. If swapping with another cylinder does not resolve the misfire, replace the ignition coil with a new one.
  4. Reattach the ignition coil and connector.

4. Clean or Replace Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector on cylinder 1.
  2. Remove the fuel injector using a suitable tool, taking care to not damage the O-rings.
  3. Clean the injector using a fuel injector cleaner or replace it with a new one if cleaning does not resolve the issue.
  4. Reinstall the injector ensuring it is seated properly and reconnect the electrical connector.

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 a few times and record the compression reading.
  4. Compare the reading to the manufacturer's specifications (typically around 160-200 psi).
  5. If the compression is low, further investigation into the engine's internals may be necessary.