A "cat converter" is a device in a car that helps reduce harmful pollutants from the exhaust, making the car less harmful to the environment. Full definition
In the countries with bad gasoline the problem is solved thanks to installing high flow cat converter and ECU reflash. (mywikimotors.com)
We have had the auto for barely a year now and have had the check motor light on for the greater part of that time because of a coming up short cat converter, however we've not had any inconvenience yet. (autolist.com)
To avoid such situation, you should better change upper catalytic converters for high flow cat converter and adjust ECU. (mywikimotors.com)