Porsche Cayenne E3 (2018-Present) engine light with P0302 code how to troubleshoot

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 battery negative terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the engine cover (if applicable).
• Locate and remove the spark plug wire or ignition coil for cylinder 2.
• Use a spark plug socket to remove the spark plug.
• Inspect the spark plug for wear; replace it if worn or fouled.
• Install the new spark plug hand-tight, then torque it to the manufacturer’s specification (usually around 15-20 Nm).
• Reattach the ignition coil or spark plug wire.

3. Test and Replace Ignition Coil (if necessary)

• Tools Required: Torque wrench.
• If the spark plug appears normal, test the ignition coil with a multimeter (refer to manufacturer specifications for resistance values).
• If the ignition coil is faulty, remove it and replace it with a new one.
• Torque the ignition coil to the specified value (usually around 10 Nm).

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector removal tool (if needed).
• Disconnect the fuel injector connector and inspect for damage.
• Remove the fuel injector from cylinder 2 using the appropriate tool.
• Clean the injector using an appropriate cleaner or replace it if damaged.
• Reinstall the fuel injector and reconnect the connector.

5. Check Compression

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading; it should be within the manufacturer’s specifications.
• If the compression is low, further investigation into engine internals may be required.