how do I fix the P0301 misfire code in my Skoda Octavia NFL (2020-Present)?

Solution

1. Preparation

• Tools Required: OBD-II scanner, spark plug socket, multimeter, compression tester, fuel injector cleaner, basic socket set.
• Disconnect the negative battery terminal to prevent any electrical shorts.

2. Replace Spark Plug

1. Remove the engine cover if present.
2. Locate the spark plug for cylinder 1 (usually at the front of the engine).
3. Use the spark plug socket to remove the spark plug from cylinder 1.
4. Inspect the removed spark plug for signs of wear or carbon buildup. Replace if necessary.
5. Install the new spark plug by hand to avoid cross-threading and then tighten to the manufacturer's specified torque (usually around 20 Nm).
6. Reattach any engine cover.

3. Test and Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil for cylinder 1.
2. Remove the ignition coil using the socket set.
3. Use a multimeter to check the primary and secondary resistance of the ignition coil (refer to specifications for the correct values).
4. If the ignition coil is faulty, replace it with a new one, ensuring it fits securely in place.
5. Reconnect the electrical connector.

4. Check Fuel Injector

1. Remove the fuel injector rail to access the injector for cylinder 1.
2. Inspect the injector for clogs or physical damage.
3. Clean the injector using fuel injector cleaner if necessary.
4. If cleaning does not resolve the issue, replace the injector with a new one.
5. Reassemble the fuel rail with the injector installed and ensure all connections are secure.

5. Verify Compression

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine and observe the compression reading; it should meet the manufacturer's specifications.
4. If the compression is low, further investigation into the piston rings, valves, or head gasket may be required.