my Porsche Cayenne E3 (2018-Present) has a check engine light with P0302 code, what does it mean?

Learn how to diagnose and fix P0302 cylinder 2 misfire in Porsche Cayenne E3. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery cable to prevent electrical shock.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover to access the ignition coils.
• Detach the electrical connector from the ignition coil of cylinder 2.
• Remove the ignition coil using a socket wrench, and inspect for damage.
• Replace the ignition coil if any issues are found.
• Replace the spark plug in cylinder 2 with a new one, ensuring it is gapped correctly according to the manufacturer’s specifications (usually around 0.028-0.032 inches for most Porsche engines).
• Reinstall the ignition coil and secure it with the appropriate torque (typically around 15 Nm).
• Reconnect the electrical connector to the ignition coil.

3. Check and Replace Fuel Injector (if needed)

• Tools Required: Fuel injector puller, cleaning solution, O-ring lubricant
• Disconnect the fuel line and electrical connector from the fuel injector of cylinder 2.
• Remove the fuel injector using a fuel injector puller.
• Inspect the injector for blockage or damage; if clogged, clean it or replace it with a new injector.
• Lubricate the new O-rings on the replacement injector with engine oil before installation.
• Reinstall the injector, ensuring it is seated properly and the clips are secured.

4. Reassemble and Test

• Reattach any components removed for access, ensuring all connections are secure.
• Reconnect the negative battery cable.
• Clear the error codes using the OBD-II scanner.
• Start the engine and observe for any misfire symptoms.