how to fix P0302 misfire code in 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

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool completely before starting work.

2. Replace Spark Plug

• Remove the engine cover (if applicable) to access the spark plug.
• Use a socket wrench to remove the spark plug from cylinder 2.
• Inspect the old spark plug for wear and carbon buildup; replace if necessary.
• Install the new spark plug with a torque specification of 22 Nm (16 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil in cylinder 2.
• Remove the ignition coil by unscrewing the mounting bolts.
• Inspect the coil for cracks or burn marks; replace if damaged.
• Install the new ignition coil and reconnect the electrical connector.

4. Check and Replace Fuel Injector (if necessary)

• Disconnect the fuel line and electrical connector from the fuel injector in cylinder 2.
• Remove the fuel injector retaining clips and pull the injector out.
• Inspect the old injector for clogs or damage; replace if necessary.
• Install the new fuel injector and reconnect the fuel line and electrical connector.

5. Compression Test (if needed)

• If misfire persists, perform a compression test on cylinder 2.
• Use a compression gauge and follow the manufacturer’s specifications for acceptable compression values.
• If compression is low, further investigation into internal engine components may be necessary.