Fap Cleaner

Catalytic converter fault codes

Catalytic converter fault codes can vary depending on the make, model and year of the vehicle. However, here are some common codes you may encounter:

• P0420: Catalyst System Efficiency Below Threshold Bank 1
• P0430: Catalyst System Efficiency Below Threshold Bank 2
• P0421: Warm Up Catalyst Efficiency Below Threshold Bank 1
• P0431: Warm Up Catalyst Efficiency Below Threshold Bank 2
• P0422: Main Catalyst Efficiency Below Threshold Bank 1
• P0432: Main Catalyst Efficiency Below Threshold Bank 2
• P0423: Heated Catalyst Efficiency Below Threshold Bank 1
• P0433: Heated Catalyst Efficiency Below Threshold Bank 2

These fault codes can be caused by a number of problems, such as faulty sensors, exhaust leaks, damaged catalytic converters or other exhaust system problems.
If you encounter any of these codes, it is recommended that you have the problem diagnosed and repaired by a qualified automotive professional to ensure the smooth operation of your vehicle and reduce harmful emissions.

You have a problem with your vehicle, such as loss of power, an engine warning light on, exhaust fumes, or you’ve failed your roadworthiness test for pollution, contact us.

Before replacing expensive parts, don’t hesitate to contact our FAP Cleaner technicians who can accurately diagnose your problems and suggest alternative solutions before replacing the parts.