how to check a catalytic converter on my Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Tools Required: OBD-II scanner, infrared thermometer, backpressure gauge, socket set.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Gather necessary safety equipment such as gloves and safety goggles.

2. Scan for Trouble Codes

• Connect the OBD-II scanner to the vehicle's OBD-II port.
• Turn the ignition to the "ON" position without starting the engine.
• Follow the scanner's instructions to read any trouble codes.
• Note down any codes related to the catalytic converter (e.g., P0420).

3. Visual Inspection

• Locate the catalytic converter along the exhaust system.
• Inspect for any visible signs of damage such as dents, cracks, or rust.
• Check the heat shield for secure attachment and any corrosion.

4. Temperature Measurement

• Start the engine and allow it to reach operating temperature.
• Use the infrared thermometer to measure the temperature of the exhaust pipe before the catalytic converter.
• Measure the temperature of the exhaust pipe after the catalytic converter.
• A significant difference (usually over 100°F) indicates proper catalytic converter function.

5. Backpressure Testing

• Remove an O2 sensor or use a designated test port before the catalytic converter.
• Connect the backpressure gauge to the test port.
• Start the engine and observe the backpressure reading; it should be below 3 psi at idle.
• If the pressure is higher, it indicates a blockage in the catalytic converter.