OBD Code P0421

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OBD Code P0421 - 5/11/2008 1:17:27 PM    jmil   Posts: 14 Score: 0 Joined: 7/30/2006 Status: offline What do you all think - My daughter came home with a check engine light. Ran it up at AutoZone and got a P0421. Reset was successful! Post #: 1

RE: OBD Code P0421 - 5/11/2008 1:45:34 PM    Sebba Posts: 13342 Score: 0 Joined: 2/20/2006 From: San Antonio, TX Status: online Thats emissions, more specifically catalytic converter. Minor, and if the car has near 100k miles, thats about right for it to be replaced anyways. Me thinks your daughter was driving a little enthusiastically at the time _____________________________ Cheap + Reliable = Not Fast Reliable + Fast = Not Cheap Fast + Cheap = Not Reliable I have found a median. I call it, DSM (in reply to jmil) Post #: 2

RE: OBD Code P0421 - 5/11/2008 1:53:26 PM    jmil   Posts: 14 Score: 0 Joined: 7/30/2006 Status: offline Would you believe 220K miles Never had it changed - Question estimate of cost? (in reply to Sebba) Post #: 3

RE: OBD Code P0421 - 5/11/2008 2:03:52 PM    Sebba Posts: 13342 Score: 0 Joined: 2/20/2006 From: San Antonio, TX Status: online Depending on if you like to be dealer raped. You do it yourself, will cost you about 150 bucks depending where you get it. An OEM catalytic converter is about 350 last time I looked. The advantage of that, is a warrenty. Holy hell 220k! _____________________________ Cheap + Reliable = Not Fast Reliable + Fast = Not Cheap Fast + Cheap = Not Reliable I have found a median. I call it, DSM (in reply to jmil) Post #: 4

RE: OBD Code P0421 - 5/11/2008 8:07:05 PM    PoolhallJunkie777 Posts: 106 Score: 0 Joined: 2/27/2008 Status: offline sebba, catch me if i am wrong..but doesnt 3gs have like four cats? i guess it would be the final cat right? anyways, if you dont want to do it yourself...muffler shop will do it fairly cheap and quick _____________________________ 1990 Chevy lumina - R.I.P. 2004 Mitsubishi Eclipse GTS - (Once I do something good for it, something bad happens) (in reply to Sebba) Post #: 5

RE: OBD Code P0421 - 5/11/2008 8:18:06 PM    Sebba Posts: 13342 Score: 0 Joined: 2/20/2006 From: San Antonio, TX Status: online Who the hell knows what one it is. But yes, a muffler shop will do it for a lot less. _____________________________ Cheap + Reliable = Not Fast Reliable + Fast = Not Cheap Fast + Cheap = Not Reliable I have found a median. I call it, DSM (in reply to PoolhallJunkie777) Post #: 6

RE: OBD Code P0421 - 5/12/2008 2:21:42 PM    dsm1990gsx Posts: 1534 Score: 0 Joined: 10/22/2007 Status: offline Po421 is warm up cataylst below threshold bank 1.  So I would get the cat replaced on bank one.  If there are 4 cats only replace the one monitored by the 02 sensors. _____________________________ 1990 Gsx-"garaged kept" 1998 Svt Contour-dd 2003 Escape-g/f's car 1993 Tsi-parted out/junked 1995 Altima gxe-sold (in reply to Sebba) Post #: 7

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