2005 jeep wrangler code po 431

Question

what is this code po431 in a jeep wrangler 2005,and how do you fix it. thanks.

Answer 1

P0431 Catalytic below threshold Bank 2

This is catalytic convertor , what can set this code is the 02 sensor, especially if any history of replacing the rear 02 sensor and having aged upstream of sensor.

​The best way to check to see if the catalytic is fault is the use of a good scan tool, a good catalytic convertor 02 sensor will stay above 650 MV, below this number the catalytic is degraded.