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Mazda Forum - Mazda Enthusiast Forums
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Threads Tagged with
421
Thread / Thread Starter
Last Post
Replies
Views
Forum
2007 Mazda 3 Fuel Consumption
Tony3
on Dec 12, 2013
Apr 3, 2021
11:25 PM
by
Alexcole
5
6,278
Mazda3
Question about 2012 Aftermarket
Ex.
on Mar 4, 2012
Mar 6, 2012
05:25 PM
by
UseYourNoggin
7
2,517
Mazda3
Dick's 2002 millenia - OBD code 421
rwparha2
on Apr 22, 2011
Apr 22, 2011
06:21 AM
by
rwparha2
0
3,167
Mazda Millenia
New Cat and o2 still get PO421 code
fast951
on Jan 7, 2009
Jan 8, 2009
03:21 PM
by
darkstar4100
2
4,195
Mazda Protege
2000 Mazda 626 code 421
biggmac
on Sep 3, 2008
Sep 3, 2008
02:27 AM
by
biggmac
0
2,195
Mazda 323,Mazda 626 & Mazda 929
header... 2.0
wireman3
on Mar 30, 2008
Aug 29, 2008
06:12 PM
by
virgin1
8
2,831
Intake, Headers and Exhaust
asking about the obx header.
(
1
2
)
Danny0522
on Feb 13, 2008
Feb 18, 2008
03:16 PM
by
Lupae3s
10
3,281
Mazda3
weapon r header
07silver6
on Nov 21, 2007
Dec 1, 2007
05:18 PM
by
07silver6
4
1,817
Mazda6
CEL problem OBDII code: P0421
carsearch
on Apr 19, 2006
Apr 24, 2006
09:06 PM
by
carsearch
6
8,963
Mazda 323,Mazda 626 & Mazda 929
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