Question about 2001 Kia Sportage
Could be many things .make sure the thermostat is operating correctly ie the engine warms up within 5 minutes when first starting it for the day . check the air filter is clean . tap the muffler and listen for any loose rusty metal flakes that could be blocking the exhaust system. get it properely diagnsed.
Posted on Aug 08, 2010
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Posted on Jan 02, 2017
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P0431 Warm up catalytic converter, bank 2 - efficiency below threshold
Possible causes: Catalytic converter, wiring, HO2S 2
increased HC emissions--no effect on engine performance unless caused by rich mixture.
To repair: Usually caused by worn out converter, but first verify fuel pressure regulator is not leaking fuel into it's vacuum port and that fuel pressure at the fuel rail is not above specification.
The car will run fine and there are no safety issues; however, before driving over anything that could ignite (for example, grass), make sure the catalytic converter is not glowing red.
If you have more questions, please let me know.
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