What is your question?
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What is your question?
Code reader says: P0431, Warm up Catalyst Efficiency Below Threshold Bank 2. Where is Bank 2 located? What part is this referring to? This is a 2003 KIA Sedona van
What makes this problem better or worse?
recently started, no noticeable problems yet
How long has your 2003 Kia Sedona had this problem?
about 2 weeks
Converter replacement is ‘more’ than likely needed .. Rarely does any other repair attempts resolve this problem. Professional *hands-on* testing will be required to confirm catalyst failure.