how to check if the catalytic converter is bad on my Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Tools Required: OBD-II scanner, infrared thermometer, backpressure gauge, socket set, and safety goggles.
• Safety Warnings: Ensure the vehicle is on a flat surface and the engine is cool before inspection.

2. Scan for Error Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn the ignition to the "On" position without starting the engine.
• Retrieve any stored trouble codes and note them for reference.

3. Visual Inspection

• Inspect the catalytic converter for physical damage.
• Check the exhaust system for loose connections or visible leaks.
• Look for signs of overheating, such as discoloration.

4. Temperature Test

• Start the engine and allow it to reach operating temperature.
• Measure the temperature at the inlet and outlet of the catalytic converter with the infrared thermometer.
• A significant temperature difference indicates that the catalytic converter is functioning properly.

5. Backpressure Test

• Follow the manufacturer’s instructions to connect the backpressure gauge to the exhaust system.
• Start the engine and observe the reading; a backpressure of more than 2.5 psi at idle may indicate a clogged converter.

6. Smoke Test

• If needed, introduce smoke into the exhaust system using a smoke machine.
• Observe for smoke escaping from any points, which would indicate a leak affecting exhaust flow.