how to fix P0302 misfire 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

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 2.
• Using the spark plug socket, unscrew and remove the spark plug.
• Inspect the spark plug for signs of wear, carbon buildup, or damage. Replace if necessary.
• Install a new spark plug, hand-tighten, then torque to the manufacturer's specifications (usually around 22 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Ratchet, socket set.
• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove any retaining bolts and carefully pull out the ignition coil.
• Inspect the coil for cracks or signs of wear. Replace if necessary.
• Install the new ignition coil, ensuring it seats properly and reconnect the electrical connector.

4. Check and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set, torque wrench.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the electrical connector from the fuel injector on cylinder 2.
• Remove any retaining clips and unscrew the injector from the fuel rail.
• Inspect the injector for clogs or damage. Replace if necessary.
• Install the new fuel injector, ensuring it seats correctly, and reconnect the electrical connector.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the fault codes.
• Start the engine and ensure there are no additional codes.