why is my Toyota RAV4 Fifth Generation (2019-present) exhaust smell like rotten eggs

Solution

1. Preparation

• Gather Tools: OBD-II scanner, socket set, fuel pressure gauge, multimeter, safety goggles, gloves.
• Safety Warning: Disconnect the battery before working on electrical systems.

2. Address Catalytic Converter Issues

• Remove Catalytic Converter:

  1. Raise the vehicle securely using jack stands.
  2. Use a socket set to remove the bolts securing the catalytic converter to the exhaust pipes.
  3. Carefully detach the catalytic converter from the exhaust system.

• Inspect and Replace if Necessary:

  1. Check for signs of damage, such as dents or melting.
  2. If damaged, install a new catalytic converter, ensuring all gaskets are replaced.
  3. Torque the bolts to the manufacturer’s specifications (refer to the service manual for exact values).

3. Replace Faulty Oxygen Sensors

• Locate and Remove Sensors:

  1. Identify the upstream and downstream oxygen sensors.
  2. Use a socket wrench to unscrew the sensors from the exhaust manifold and catalytic converter.

• Install New Sensors:

  1. Apply anti-seize compound to the threads of the new sensors.
  2. Install the new sensors and tighten to the specified torque.

4. Final Assembly and Testing

• Reattach Exhaust System:

  1. Reconnect the catalytic converter and secure it with bolts.
  2. Ensure all components are tight and leak-free.

• Reconnect Battery: Ensure the battery is reconnected.