1998 Honda Cr V Error Codes P0420Summary: DIAGNOSTIC TROUBLE CODE P0420 AND/OR P0430, CATALYSTEFFICIENCY (V6). *NM MODELS 2003-2004 ODYSSEY, 2003 ACCORD. Acura * Audi *Repair Information for P
2006 Honda Odyssey p0420 My malfunction indicator light came on about 900 miles ago. I took it to Autozone and they told me I have the catalyst efficiency below threshold (p0420) trouble code and it is probably an O2 sensor. On the advice of a mechanic friend I put a can of Seafoam ...