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
Just installed new header and high flow cat on my 96 Honda Accord. Now I got an engine light on. Code is P0420. Will a high flow cat make this light come on? Also is a high flow cat bad? #14 - Jason - 10/06/2009 - 21:542001...