how to diagnose and fix a catalytic converter issue in Porsche Cayenne E3 (2018-Present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface, engage the parking brake, and disconnect the battery.

2. Remove the Exhaust System

• Using a socket set, remove the bolts securing the exhaust system at the catalytic converter.
• Carefully lower the exhaust system, ensuring no damage occurs to other components.
• Tools Required: Socket set, rubber mallet.

3. Inspect and Replace Catalytic Converter

• Inspect the catalytic converter for physical damage or blockage. If replacement is needed:
  • Remove the bolts holding the catalytic converter in place.
  • Install the new catalytic converter, ensuring proper alignment.
  • Torque bolts to manufacturer specifications (typically around 30-40 lb-ft, but verify with service manual).
• Tools Required: Torque wrench, new gaskets (if applicable).

4. Reinstall Exhaust System

• Reattach the exhaust system by reversing the removal steps.
• Ensure all connections are tight and secure to prevent leaks.
• Tools Required: Torque wrench, socket set.

5. Reconnect Battery and Clear Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear any diagnostic trouble codes.
• Start the engine and allow it to reach operating temperature.