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!@#$%^ code 420
Posted: Sun Nov 25, 2007 9:55 am
by silentneon01
its a great freaking code for an exhuast problem.
Ok I've changed both o2 senors. I changed the cat to a high flow cat last year. I've changed plugs and wires. But I'm still throwing code 420 wth....
Anyone got any ideas
2001 dodge neon 140K
AEM CAI
F/X UDP
R/T dual outlet exhuast
Posted: Sun Nov 25, 2007 10:54 am
by gilly02le
upstream o2 and downstream o2 must see a difference in readings, or this code will be present. So, is your lower o2 sensor, before your cat by chance?
Posted: Sun Nov 25, 2007 1:15 pm
by Cbussilver01es
Your cat is probably clogged, I kept throwin that code like crazy when my cat was clogged. I think its because your upstream and downstream o2 are reading the same,
tho Im not completely certain.
Posted: Sun Nov 25, 2007 3:11 pm
by kevo
considering you have a high flow cat, did you use the non fouler trick with it?
Posted: Sun Nov 25, 2007 3:19 pm
by silentneon01
kevo wrote:considering you have a high flow cat, did you use the non fouler trick with it?
No what do I have to do?
and downstream is in the cat.
Posted: Sun Nov 25, 2007 6:08 pm
by Cbussilver01es
http://forum.2gn.org/viewtopic.php?t=1025
^Non Fouler trick
Kevo wrote:considering you have a high flow cat, did you use the non fouler trick with it?
Now I thought if you were running a gutted cat or a high flowing cat w/o the non fouling mod, you'd be getting a P0141 or P0140 instead of the P0420 code