Mechanics

ENGINE PERFORMANCE

2003 Kia Sorento

Engine Performance problem
2003 Kia Sorento 6 cyl Two Wheel Drive Automatic 24,600 miles

trouble code P0431. Warm Up Catalyst Efficiency Below Threshold Bank 2. When my suv accelerates I have a whistling sound. I have poor acceleration at 2,500 RPM.
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Alexpunisher
May 19, 2009.



If you hear a whisteling sound and have low power with that code, chances are the converter is plugged on that side. You need to have it checked for backpressure.

Let me know what you find.



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