my Toyota RAV4 XA50 (2019-2024) has a bad smell coming from the exhaust, what does it mean?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and is turned off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Repair Exhaust System

• Sub-steps:
  1. Raise the vehicle using a jack and secure it with jack stands.
  2. Inspect the exhaust pipes, muffler, and catalytic converter for rust, holes, or damage.
  3. If any components are damaged, remove the affected parts using a socket set and replace them with new ones.
  4. Reattach any loose fittings and ensure all clamps are tight.

3. Check Fuel System

• Sub-steps:
  1. Inspect fuel injectors for leaks; replace any faulty injectors.
  2. Check the fuel pressure regulator for proper function; replace if necessary.
  3. Clean or replace the air filter to ensure proper air intake.

4. Inspect Engine Coolant and Oil

• Sub-steps:
  1. Check the coolant reservoir and radiator for proper levels; top off with the correct coolant type if low.
  2. Inspect oil for signs of coolant contamination (milky appearance); if contaminated, perform an oil change and investigate the source of the leak.

5. Test Catalytic Converter

• Sub-steps:
  1. Use an infrared thermometer to check the temperature difference between the inlet and outlet of the catalytic converter.
  2. If temperature difference is minimal, consider replacement of the catalytic converter.