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I have a P0431 and P0421 code, for a 2003 Kia Sedona XE. what should I do?

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I have a P0431 and P0421 code, for a 2003 Kia Sedona XE. what should I do?

Vehicle: 2003 Kia Sedona XE

1 Answer

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Could be that you have an air leak in the intake system.

P0431 KIA - Warm Up Catalyst Efficiency Below Threshold Bank 2
Read more: https://www.autocodes.com/p0431_kia.html

P0421 KIA - Warm Up Catalyst Efficiency Below Threshold Bank 1
Read more: https://www.autocodes.com/p0421_kia.html

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