how to resolve engine code P0302 on my Volkswagen Passat B8 (2015-2022)

Solution

1. Preparation

• Gather 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 any electrical shorts.

2. Replace Spark Plug and Ignition Coil

• Tools Required: Socket set, torque wrench, spark plug gap tool, pliers, and screwdriver.
• Sub-steps:
  1. Remove the engine cover (if applicable) by unscrewing any fasteners.
  2. Locate the ignition coil for cylinder 2 (typically near the spark plug).
  3. Disconnect the electrical connector from the ignition coil.
  4. Unscrew the ignition coil using a socket wrench and remove it from the cylinder head.
  5. Remove the spark plug with a spark plug socket and inspect it for wear or damage.
  6. Install the new spark plug, ensuring it is gapped correctly (typically 0.028-0.032 inches for VW).
  7. Reinstall the ignition coil over the new spark plug and secure it with screws.
  8. Reconnect the electrical connector to the ignition coil.

3. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, injector puller (if necessary).
• Sub-steps:
  1. Remove the fuel rail if needed to access the fuel injector for cylinder 2.
  2. Disconnect the fuel line and electrical connector from the injector.
  3. Remove the fuel injector from the rail and inspect it for clogs or damage.
  4. Clean the injector using a fuel injector cleaning solvent.
  5. Reinstall the injector and reconnect the fuel line.

4. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code from the engine control unit (ECU).