Description
Three way catalytic converter (TWC) serves to convert hydrocarbons (NS), carbon monoxide (SO) and nitrogen oxides (Nox), contained in exhaust gases into carbon dioxide (CO2), nitrogen (N2) and water vapor.
Examination
If you suspect excessive exhaust back pressure, remove the TWC from the vehicle and use a flashlight to visually check for catalytic converter blockage, melting, or cracking. If there are visible areas of damage or blockage, replace the TWC.