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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Steps:
  1. Remove the engine cover if applicable.
  2. Locate the spark plug for cylinder 2.
  3. Use a socket and ratchet to remove the spark plug.
  4. Inspect the spark plug for wear or damage; replace if necessary.
  5. Install the new spark plug, tightening it to the manufacturer's specified torque (typically around 25 Nm for most applications).

3. Inspect and Replace Ignition Coil

• Tools Required: Torque wrench, ratchet set.
• Steps:
  1. Disconnect the electrical connector from the ignition coil for cylinder 2.
  2. Remove the ignition coil by unscrewing the retaining bolts.
  3. Install a new ignition coil, ensuring it is seated correctly and secured with bolts.
  4. Reconnect the electrical connector.

4. Test and Replace Fuel Injector (if necessary)

• Tools Required: Noid light, fuel injector removal tool (if applicable).
• Steps:
  1. Connect a noid light to the injector connector for cylinder 2 to test for electrical signal.
  2. If no signal is detected, inspect the wiring for damage; repair or replace as needed.
  3. If the injector is faulty, remove it using a fuel injector removal tool, then install a new fuel injector.
  4. Reconnect the fuel line and electrical connector.

5. Final Checks

• Reconnect the battery terminal.
• Start the engine and let it idle to ensure there are no misfire symptoms.
• Clear the error codes using the OBD-II scanner and perform a test drive.