how to check the catalytic converter on Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Inspect the Exhaust System

• Sub-steps:
  • Visually inspect the exhaust pipes leading to and from the catalytic converter for rust, holes, or leaks.
  • Check the heat shield around the catalytic converter for any signs of damage.

3. Temperature Test

• Sub-steps:
  • Start the engine and allow it to reach operating temperature.
  • Use a laser thermometer to measure the exhaust temperature at the inlet (before the catalytic converter) and the outlet (after the catalytic converter).
  • Note the temperatures; a drop of more than 100°F (approximately 38°C) could indicate a blockage.

4. Back Pressure Test

• Sub-steps:
  • Locate the upstream oxygen sensor and carefully remove it.
  • Insert a pressure gauge into the oxygen sensor port.
  • Start the engine and note the back pressure; readings above 1.5 psi at idle may indicate a clogged converter.

5. Final Inspection

• Sub-steps:
  • Tap the catalytic converter lightly with a rubber mallet. Listen for rattling sounds, which may indicate internal failure.
  • If any issues are found, proceed to replace the catalytic converter.

Tools Required:

• OBD-II scanner
• Laser thermometer
• Back pressure gauge
• Socket set
• Rubber mallet

Parts Required:

• Replacement catalytic converter (if necessary)

Estimated Repair Time: 1-2 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow the engine to cool completely before performing any inspections or repairs.