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Mitsubishi Forum - Mitsubishi Enthusiast Forums
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Threads Tagged with
p0421
Thread / Thread Starter
Last Post
Replies
Views
Forum
Check Enginer Light is Never Ending!!
saltieann
on Dec 20, 2010
Dec 21, 2010
08:35 AM
by
Fe2O3
2
1,667
Mitsubishi Lancer and Lancer Sportback
Getting a P0421 code! Popping sound in exhaust. Odd idle.
rowebil
on Oct 20, 2010
Oct 20, 2010
06:44 PM
by
rowebil
0
2,688
3rd Generation
OBDII code P0421 - What should I do?
Meph1st0
on Oct 13, 2010
Oct 13, 2010
11:38 PM
by
Meph1st0
0
8,514
3rd Generation
OBD Code p0135 and P0421
se7en
on Jan 8, 2009
Oct 6, 2010
10:17 AM
by
snowmobiler168
8
12,948
3rd Generation
Dtc p0421
bob1952
on Aug 17, 2010
Aug 17, 2010
06:44 PM
by
bob1952
0
1,642
New Members Area
I need a little help: P0421 and P0431
thesammythecurse
on Apr 21, 2010
Apr 27, 2010
05:25 PM
by
thesammythecurse
5
37,427
Mitsubishi Galant
My baby is sick. . .
nawgee
on Mar 21, 2008
Dec 23, 2009
04:53 PM
by
kingkingwolf
9
1,401
Mitsubishi Lancer and Lancer Sportback
so i got this code P0421
(
1
2
3
)
blufabric
on Mar 25, 2008
Dec 23, 2009
04:29 PM
by
kingkingwolf
29
15,011
Mitsubishi Lancer and Lancer Sportback
New and looking for help
Electrofelt
on Jul 28, 2009
Jul 28, 2009
05:32 PM
by
dsm1990gsx
1
768
Intake, Headers and Exhaust
P0421 Yes i searched..
Schnupper
on Jul 10, 2009
Jul 20, 2009
07:11 PM
by
dsm1990gsx
7
2,831
Mitsubishi Lancer and Lancer Sportback
P0400 & p0421
sierrenity
on Apr 29, 2009
Apr 29, 2009
10:09 AM
by
sierrenity
0
3,508
Mitsubishi Mirage
OBD code P0421, whats the fix?
Fe2O3
on Jan 20, 2009
Feb 6, 2009
10:41 PM
by
dsm1990gsx
6
9,928
Mitsubishi Lancer and Lancer Sportback
2001 ES - Many problems...
dwayotte
on Jan 27, 2009
Jan 27, 2009
01:01 AM
by
dwayotte
0
2,804
Mitsubishi Galant
OBD Code P0421
jmil
on May 11, 2008
May 12, 2008
04:21 PM
by
dsm1990gsx
6
10,365
3rd Generation
'99 Montero Catalytic Converter & Mac Auto Parts
jrmdir
on Jan 6, 2007
Jan 6, 2007
04:09 PM
by
jrmdir
0
7,382
Mitsubishi Montero & Montero Sport
99 Montero OBD Code Help: P0421
jrmdir
on Dec 15, 2006
Dec 18, 2006
05:49 PM
by
jrmdir
2
5,253
Mitsubishi Montero & Montero Sport
Spark plugs
(
1
2
)
MyEclipse
on May 23, 2006
May 26, 2006
09:49 AM
by
TheEngineer
10
2,349
3rd Generation
P0421, new 2 this...help!
PoconosKel
on Mar 26, 2004
Mar 26, 2004
09:58 PM
by
PoconosKel
0
2,911
New Members Area
P0421, dont understand plz HELP!
PoconosKel
on Mar 26, 2004
Mar 26, 2004
09:56 PM
by
PoconosKel
0
3,765
Mitsubishi Galant
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