2004 Kia Sorento

Engine Performance problem
2004 Kia Sorento 6 cyl Four Wheel Drive Automatic 117000 miles

i drive a 2004 kia serento, the check enegine light came on. And I check the code it was a po431 code. What does that mean(po431)
February 15, 2009.

P0431 Warm Up Catalyst Efficiency Below Threshold

Tests/Procedures: 1. Monitor the front and rear oxygen sensors while driving the vehicle at approximately 55 miles an hour. The oxygen sensors should cross-count consistently 8-10 times per 10 seconds.

2. Monitor the fuel trims for being normal at idle and at 55 MPH steady cruise.

3. Check the inlet to outlet temperature on the catalytic converter. Generally the rear should be 50 degrees, or more, hotter.

Potential Causes: Faulty oxygen sensor
Catalytic converter

Feb 15, 2009.