p0421 - AudiWorld Forums - Threads Tagged with p0421 - Page 3

AudiWorld Forums
Tags
Threads Tagged with p0421

Page 3 of 3

3

Threads Tagged with p0421

Thread / Thread Starter

Last Post

Replies

Views

Forum

18, 2002, 2004, a4, apr, audi, b6, b7, cheap, escort, fix, p0420, p0421, po420, resistor

Need P0421 and P0420 ghetto fix - already STFU

Silver02A4Quattro on Apr 6, 2007

Apr 8, 2007 03:27 PM
by MM120

Go to last post

9

5,923

A4 (B6 Platform) Discussion

16805, 17831, 28, a6, audi, cel, combi, p0421, p0431, p1411, p1423, s4, valve, vw

Opinion need - O2 Sensor & Combi Air Valves

plova on Feb 5, 2007

Feb 6, 2007 04:35 AM
by 4Driver4

Go to last post

3

1,143

A6 / S6 (C5 Platform) Discussion

0421, 2001, a6, audi, back, catalyst, code, codes, coming, efficiency, p0421, p0431, s4, threshold, warmup

P0421,P0431 Cat Efficiency Codes with APR software

(

Multi-page thread

1 2)

tmaslar on Jan 21, 2007

Jan 24, 2007 06:54 PM
by Jason @ Streetwerke

Go to last post

12

3,809

S4 / RS4 (B5 Platform) Discussion

07, 2004, audi, code, codes, p0421, p0431, s4

Newbie Question: P0431 CEL Code

87ninefiveone on Jan 19, 2007

Jan 21, 2007 07:00 AM
by 87ninefiveone

Go to last post

9

718

S4 / RS4 (B5 Platform) Discussion

16805, audi, bank, catalist, code, effisioncy, p0421, po421

P0421/16805: Warm up catalyst efficiency below threshold, bank 1...

PSUEng on Jan 19, 2007

Jan 21, 2007 06:59 AM
by 87ninefiveone

Go to last post

3

2,573

S4 / RS4 (B5 Platform) Discussion

00716, 00962, 16805, 16815, a4, air, alarm, b6, catalyst, exceeded, limit, p0421, p0421001, recirculation, sensor, tilt, upper, via, warm

Fault codes from VAG scan...16805, 16815, 00716, 00962. Anyone seen/have these before?

SilverSchwinn on Nov 19, 2006

Nov 20, 2006 07:04 PM
by SilverSchwinn

Go to last post

8

17,188

A4 (B6 Platform) Discussion

b5, downpipes, p0421, passing, s4, smog

Smog question for those using AWE Stage3 kits with APR downpipes.

Quattrosaurus on Oct 3, 2006

Oct 3, 2006 08:21 AM
by Marcus Frost

Go to last post

6

390

SoCal Discussion

2000, 27t, 28, a4, audi, code, p0300, p0421, p0431, po300, po431

Multiple Codes p0300, p0421 and p0431

WillyumYum on Jun 20, 2006

Jun 20, 2006 11:42 AM
by WillyumYum

Go to last post

2

1,635

A6 / S6 (C5 Platform) Discussion

01367, 035, 2000, audi, dtc, misfire, misfires, p0421, piggies, plugs, replced, s4, spark, sparkplugs

Replaced Spark plugs. .Now getting Misfires code ... !!

(

Multi-page thread

1 2)

Diavan on Jun 17, 2006

Jun 18, 2006 03:40 PM
by erik9108

Go to last post

11

1,263

S4 / RS4 (B5 Platform) Discussion

2004, audi, bulletin, c260503, catalyst, fix, p0421, p0431, recall, service, tech, technician, threshold, touareg, vw

For those of you with the infamous catalyst error/CEL...

snowcat on May 17, 2006

May 18, 2006 06:28 AM
by Edd W

Go to last post

8

4,042

A6 / S6 (C5 Platform) Discussion

16805, audi, bank, bank1, cap, catalyst, codes, downpipes, efficiency, gas, p0421, s4, threshold, vag, warm, work

P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1)

Object on Nov 29, 2005

Nov 30, 2005 07:01 AM
by RedWing

Go to last post

6

10,002

S4 / RS4 (B5 Platform) Discussion

2002, 2004, 30, a4, audi, p0421

P0421 Diagnosis

Kev 3.0 on Oct 25, 2005

Oct 25, 2005 11:04 AM
by akula-ssh

Go to last post

2

501

A4 (B6 Platform) Discussion

001, 02, 2002, 2004, 30, a4, audi, bad, code, fix, high, o2, oxygen, p0421, po421, sensor

P0421 code for O2 sensor

Kev 3.0 on Oct 24, 2005

Oct 25, 2005 09:38 AM
by Kev 3.0

Go to last post

8

4,068

A4 (B6 Platform) Discussion

02, 03, 12001, 2003, 27t, 28, a6, audi, bank, codes, p0421, p0431, passat, sensor, tsb, vw

Can somebody explain this emission/cat question for me?

(

Multi-page thread

1 2)

slimmn on Aug 19, 2005

Aug 19, 2005 12:36 PM
by 6ULDV8

Go to last post

15

1,101

A6 / S6 (C5 Platform) Discussion

audi, code, p0421, problem

Cat problem - actually code P0421

geauxfaster on Aug 18, 2005

Aug 19, 2005 11:55 AM
by geauxfaster

Go to last post

7

1,053

A6 / S6 (C5 Platform) Discussion

27, 3510, a6, audi, dakota, diagnostics, p0421, po421, vagcom

emission test question ....P0421....please read...tx

audi2.7audi on Jun 14, 2005

Jun 14, 2005 09:52 AM
by 4Driver4

Go to last post

4

926

A6 / S6 (C5 Platform) Discussion

2003, allroad, audi, flashing, idicator, light, malfuntion, p0302, p0421, p0431

2001 TSBs

glidar on Jun 14, 2005

Jun 14, 2005 09:23 AM
by glidar

Go to last post

0

753

16805, 16805p0421, 27, 27t, audi, cel, p0421, po421

2000 2.7T. CEL Code 16805 P0421

ecgarzone on Mar 12, 2005

Mar 16, 2005 02:12 PM
by ecgarzone

Go to last post

2

1,364

VAG-COM Discussion

audi, converter, p0421, precatalytic, s4

Emissions testing failure in WI w/ GIAC X

(

Multi-page thread

1 2)

Juggernaut on Jan 31, 2005

Jan 31, 2005 06:20 PM
by Mike2kS4

Go to last post

13

569

S4 / RS4 (B5 Platform) Discussion

2000, 27, audi, bulletin, cel, code, p0421, p0431

Anyone had their computer reprogrammed for CEL code P0421 or P0431?

atikovi@excite.com on Sep 30, 2004

Oct 1, 2004 06:49 PM
by steve l

Go to last post

7

1,263

audi, bmw, bung, exhaust, m3, p0421

Again, CEL on 2 days later= what should I do guys? P0421

(

Multi-page thread

1 2)

MDIAU on May 27, 2004

May 27, 2004 04:12 PM
by mpwolf

Go to last post

10

590

S4 / RS4 (B5 Platform) Discussion

Page 3 of 3

3

All times are GMT -8. The time now is 05:08 AM.