how to identify if my Toyota Corolla E170 (2013-2019) has a bad catalytic converter

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery terminal to prevent electrical shorts.

2. Remove the Catalytic Converter

• Tools Required: Socket set, ratchet, torque wrench, penetrating oil.
• Apply penetrating oil to the bolts securing the catalytic converter to the exhaust system to ease removal.
• Use a socket to remove the bolts from the exhaust flanges connecting the catalytic converter.
• If applicable, detach any heat shields or brackets securing the catalytic converter.

3. Inspect and Clean

• Examine the catalytic converter for any signs of internal damage or contamination.
• If the converter is clogged, it may need to be replaced. If it is just dirty, it may be possible to clean it using a catalytic converter cleaner (follow the product instructions).

4. Install New Catalytic Converter (if necessary)

• Tools Required: Gasket scraper, new exhaust gaskets.
• Ensure that the new catalytic converter matches the specifications for the Toyota Corolla E170.
• Install any necessary new gaskets at the exhaust flanges.
• Position the new catalytic converter and secure it with bolts, tightening them to the manufacturer's specified torque values.

5. Reconnect Battery and Test

• Reattach the battery terminal.
• Start the engine and check for any exhaust leaks around the installation area.
• Allow the vehicle to idle and monitor the check engine light; clear any codes if necessary.