how to fix P0302 code on Skoda Octavia NFL (2020-Present)

Learn how to diagnose and fix P0302 cylinder 2 misfire in Skoda Octavia NFL. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Ensure the vehicle is parked on a flat surface, and the engine is cool before beginning work.

2. Replace Spark Plug

• Sub-steps:
  1. Disconnect the negative battery terminal.
  2. Remove the engine cover if applicable to access the spark plugs.
  3. Use a spark plug socket to remove the spark plug from cylinder 2.
  4. Inspect the spark plug for signs of wear or damage.
  5. Install a new spark plug, ensuring a gap of 0.7-0.8 mm (specify your vehicle's requirement).
  6. Torque the spark plug to manufacturer specifications (typically around 25 Nm).

3. Replace Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil on cylinder 2.
  2. Unbolt the ignition coil and carefully remove it from the spark plug.
  3. Install the new ignition coil, ensuring it seats properly.
  4. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Remove the fuel rail if necessary to access the injector.
  3. Remove the injector from the rail and inspect it for clogs or damage.
  4. Clean the injector using a suitable fuel injector cleaner or replace it if necessary.
  5. Reinstall the injector into the rail, ensuring proper seating and reseal if needed.

5. Perform Compression Test (if misfire persists)

• Sub-steps:
  1. Remove all spark plugs for better compression reading.
  2. Insert the compression tester into cylinder 2's spark plug hole.
  3. Crank the engine for several seconds and record the reading.
  4. Compare the reading with the manufacturer's specifications (typically around 10-15 bar).
  5. If readings are low, assess for potential internal engine problems.