how to identify if the catalytic converter on my Ford Explorer Fifth Generation (2011-2019) is bad?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on level ground and secure it with jack stands if elevated.

2. Remove the Catalytic Converter

• Use a socket set to detach the bolts securing the catalytic converter to the exhaust system.
• Carefully remove any sensors (e.g., O2 sensors) attached to the converter, using a wrench if necessary.
• Remove the catalytic converter from the vehicle; it may require some force if rusted.

3. Inspect and Clean

• Inspect the catalytic converter for any physical damage, blockage, or excessive carbon buildup.
• If the converter is reusable, clean the exterior with a suitable solvent and wire brush, avoiding any damage to the substrate.

4. Install New Catalytic Converter (if necessary)

• If replacing, take the new catalytic converter and align it with the exhaust system.
• Reattach the O2 sensors securely and ensure they are properly connected.
• Use a torque wrench to tighten the bolts to the manufacturer's specifications (check the service manual for exact torque values).

5. Final Steps

• Reconnect the negative battery terminal.
• Start the engine and check for any exhaust leaks around the installation area.