2003 Kia Sorento engine performance

2003 KIA SORENTO
24,600 MILES • 6 CYL • 2WD • AUTOMATIC
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ALEXPUNISHER
  • MEMBER
  • 1 POST
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.
May 19, 2009 at 9:12 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
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.
Oct 13, 2009 at 3:36 AM
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