how to fix P0302 code on Porsche Cayenne E3 (2018-Present)

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

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if present.
2. Locate cylinder 2 spark plug (refer to the owner's manual for location).
3. Using a socket set, remove the spark plug.
4. Inspect the spark plug for damage or carbon buildup. Replace if necessary.
5. Install a new spark plug and torque to manufacturer specifications (usually around 20 Nm).
6. Reconnect the ignition coil.

3. Inspect and Replace Ignition Coil

1. Remove the ignition coil from cylinder 2.
2. Inspect for cracks or signs of wear. Replace if damaged.
3. Install the new ignition coil and ensure it is firmly seated.
4. Reconnect the electrical connector.

4. Check and Clean Fuel Injector

1. Disconnect the fuel injector connector and the fuel line (use appropriate safety measures).
2. Remove the fuel injector from cylinder 2.
3. Clean the injector using a fuel injector cleaner or replace it if clogged or damaged.
4. Reinstall the injector and reconnect the fuel line and electrical connector.

5. Perform Compression Test

1. Remove the spark plug from cylinder 2.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for several seconds and take note of the reading.
4. Compare the compression reading to the manufacturer’s specifications. If low, further engine inspection may be required.