how to fix P0302 misfire code on Volkswagen Passat B8 (2015-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is off and cool before starting work.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable using a socket set.
2. Disconnect the ignition coil connector for cylinder 2.
3. Remove the ignition coil using a socket wrench.
4. Extract the spark plug using a spark plug socket.
5. Check the spark plug condition; replace if worn or fouled. Use a spark plug with the correct heat range and gap as specified by the manufacturer.
6. Reinstall the new spark plug and torque it to the manufacturer’s specifications (typically around 20 Nm).

3. Inspect and Replace Ignition Coil

1. If the spark plug is in good condition, inspect the ignition coil for cracks or signs of wear.
2. Replace the ignition coil for cylinder 2 if defective, ensuring to use an OEM or quality aftermarket part.
3. Reconnect the ignition coil connector and ensure it is seated properly.

4. Check and Replace Fuel Injector (if necessary)

1. If the ignition components are fine, check the fuel injector operation by removing the fuel rail and inspecting the injector for blockage or leaks.
2. Replace the fuel injector for cylinder 2 if it is malfunctioning, ensuring to use the correct replacement part.
3. Reinstall the fuel rail and reconnect any fuel lines.

5. Reassemble and Reconnect

1. Reinstall the ignition coil and engine cover if removed.
2. Reconnect the negative battery terminal.
3. Clear the error codes using the OBD-II scanner.