po421 - AudiForums.com - Threads Tagged with po421

AudiForums.com
Tags
Threads Tagged with po421

Threads Tagged with po421

Thread / Thread Starter

Last Post

Replies

Views

Forum

03, 30, a6, audi, catalyst, code, ecu, error, p0421, p0431, po421, po431, software, update, warm

Warm Up Catalyst Efficiency P0421, P0431

Euge82 on Mar 15, 2013

Sep 16, 2014 10:10 AM
by ppgoal

Go to last post

6

25,370

2002, 30, a4, audi, bank, cat, check, code, dtc, engine, light, obd2, p0421, p0431, po421, quattro

2002 A4 3.0 Quattro DTC P0421/P0431

AnthonyVas79 on Mar 17, 2012

Apr 8, 2012 11:48 PM
by aquariumjunky

Go to last post

2

8,465

audi, cat, catalyst, catalytic, check, code, converter, efficiency, engine, light, p0241, po421, replaced, threshold, warm

P0241: Warm Up Catalyst Efficiency Below Threshold

mogwai88 on Mar 31, 2012

Mar 31, 2012 12:09 PM
by bigdadi

Go to last post

1

11,562

2001, 421, a4, a6, audi, bad, cat, code, doe, fix, fixing, p0431, po421, po431, reflash, s4

How to fix the problem coming up with the code P0431

sixcoco on Jan 25, 2012

Feb 13, 2012 02:51 PM
by Rolling Blackout

Go to last post

8

13,241

02, a4, a6, audi, bank, catalyst, cel, code, denver, effeciancy, emission, error, p0421, po421, test

CEL: Code P0421

(

Multi-page thread

1 2 3 ... Last Page)

saintforlife on Jul 24, 2007

Oct 26, 2011 08:57 PM
by igortiger

Go to last post

61

79,793

2001, 27, 27t, a4, a6, audi, blocks, cat, clean, code, engine, measuring, p0421, po421, vag

help p0421 cat code what to do?

ratherb1 on May 3, 2011

May 3, 2011 11:31 AM
by ratherb1

Go to last post

0

5,374

00, 0421, 1131, 2000, a4, audi, audib5s4p0421, b5, b5s4, b5s4p0421, code, diagnostic, means, p0421, po421, s4

'00 B5 S4 with P0421

the24thletter on Apr 16, 2011

Apr 16, 2011 02:08 PM
by the24thletter

Go to last post

0

4,117

S Car Model Line

Question

2002, 30, a4, audi, avk, b6, cod, code, fwd, p0421, p421, passenger, po421, sensor, v6

P0421 on a 2002 3.0 V6 Fwd, what to do ?

ScGiants28 on Feb 9, 2011

Feb 9, 2011 11:49 PM
by ScGiants28

Go to last post

0

2,412

2002, 241, 30, a4, allroad, audi, bank, catalytic, code, converter, engine, p0241, po, po241, po421

PO241 Diagnostic Code

psanta on Jul 22, 2010

Aug 5, 2010 05:31 PM
by psanta

Go to last post

2

4,422

2001, 50, a6, audi, change, code, codes, diagnostic, miles, oil, p0156, p0421, po421, quatro, reset, service

P0156... sometime after P0421

alex jb on May 19, 2010

May 20, 2010 11:26 AM
by hxgaser

Go to last post

2

3,296

a4, a6, audi, bad, bosch, bwd, catalyst, code, egt, p0421, po421, quattro, s4, sensor, warm, wires

Can the p0421 code really be connected to a vac. leak??

(

Multi-page thread

1 2)

cacaro on Oct 20, 2009

Jan 8, 2010 03:34 PM
by cacaro

Go to last post

18

4,723

S Car Model Line

02, 02audi, 30, a4, audi, audiforums, engine, forums, p0300, p0304, p0421, po421, problems, sale, v6

02 Audi A4 3.0 Quarttro for sale

707782y on Jan 2, 2010

Jan 4, 2010 02:57 AM
by 707782y

Go to last post

1

1,546

Archive - Vehicles for Sale

2002a6, 30, audi, catalyst, code, p0421001, po421, replacement, warm

Oxygen (02) Senor replacement - preferred brand?

(

Multi-page thread

1 2)

j_dinan on Jul 27, 2009

Jul 28, 2009 12:50 AM
by hxgaser

Go to last post

12

2,275

2000, booster, check, code, engine, fuel, light, lucas, octane, outback, p0421, po421, po741, rid, subaru

check engine light from fuel sys cleaner ??

(

Multi-page thread

1 2 3)

graybno on Jan 31, 2009

Feb 12, 2009 08:41 AM
by padog

Go to last post

29

8,257

2002, 2003, 2004, 30, a4, a6, audi, cats, chevrolet, error, error1, estereo, p0421, po421, side

P0421 error 1 Cat or 2?

Madtown on Sep 3, 2008

Jan 14, 2009 09:00 PM
by 5th_year_senior

Go to last post

2

1,585

02, 2002, a4, a6, audi, audia, code, codes, dtc, fault, location, p0431, po421, po431, quattro

fault codes po421 and po431

simsaudi3.0 on Feb 2, 2008

Mar 12, 2008 11:37 PM
by tj19855

Go to last post

7

9,173

2000, 421, 431, a4, allroad, audi, code, codes, fault, po, po421, po431, reflash

MOVED: fault codes po421 and po431

simsaudi3.0 on Feb 6, 2008

Feb 6, 2008 09:57 PM
by simsaudi3.0

Go to last post

0

1,941

2000, 2001, a6, audi, catalytic, code, codes, cold, converter, o2, p0421, po421, s4, sensor, start, trouble

Code p0421

typhoonfd on Nov 23, 2007

Nov 23, 2007 10:00 AM
by typhoonfd

Go to last post

4

2,081

S Car Model Line

All times are GMT -4. The time now is 10:34 AM.