how to diagnose a P0302 code on my 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

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on the electrical components.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2 using a socket set.
• Remove the spark plug from cylinder 2 using a spark plug socket.
• Inspect the spark plug for signs of wear (e.g., fouling, excessive gap).
• If necessary, replace the spark plug with a manufacturer-recommended part.
• Reinstall the ignition coil after replacing the spark plug.

3. Test and Replace Ignition Coil (if necessary)

• Use a multimeter to check the resistance of the ignition coil for cylinder 2; compare it with specifications.
• If the resistance is outside the specified range, replace the ignition coil with a new unit.
• Reconnect the ignition coil and ensure it is seated properly.

4. Check and Replace Fuel Injector (if necessary)

• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check the injector’s resistance and ensure it is within specifications.
• If the injector is faulty, replace it with a new one and reconnect.

5. Conduct Compression Test

• Remove the spark plug from cylinder 2.
• Insert a compression tester into the spark plug hole.
• Crank the engine and record the compression reading. Compare it to manufacturer specifications.
• If the compression is low, further investigation is needed to determine the cause.