Threads Tagged with p0420

2001, 2002, 2005, 42, 99, a6, audi, c5, cat, code, foulers, p0420, trick, tricks, tt

A6 4.2 with P0420, anyone tried the plug fouler trick?

d6lc on Nov 29, 2012

Jan 18, 2013 07:45 AM
by Philhawtin

9

4,370

16516, audi, code, control, dtc, failure, obd, p0140, p0159, p0420, p0507, p1509, p1602, trouble, unit

Work in progress...AUDI DIAGNOSTIC TROUBLE CODE (DTC) OVERVIEW.

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Colonel Bogey on Oct 18, 2000

Dec 4, 2012 02:08 PM
by zsolt1

19

21,653

18t, 42, a4, a6, audi, bad, cat, code, emission, induction, p0420, p0422, p0423, pump, sai

Failed SAI Pump (P1411&P1423) Causing P0423 Cat Code?

prehayem on Oct 2, 2012

Oct 22, 2012 04:32 AM
by rohit13

5

3,119

2.7T V6 Discussion

0420, 16804, 18t, 2001, 42, a3, a4, a6, a8l, audi, code, codes, common, fault, p0420, po420, q5

p0420 fault code on 2006 Audi A3

liern on Jul 1, 2012

Jul 1, 2012 07:55 AM
by liern

0

6,060

Audi A3 / S3 / RS 3

1999, 2001, 27t, 28, 99, a4, a6, audi, b8, code, denali, gmc, p0420, po420, vag, yukon

P0420 CAT OR 02 sensor? 2.8l FWD

rohit13 on Dec 21, 2011

Dec 23, 2011 11:08 AM
by rohit13

9

6,857

a4, audi, bad, clear, code, fix, o2, p0150, p0420, seafoam, sensor, symptoms, volkswagen

Need help diagnosing emission codes...

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GTA_Driver on Oct 19, 2011

Oct 20, 2011 07:00 AM
by GTA_Driver

11

2,640

18t, 2003, 2004, a4, a6, audi, b6, code, codes, engine, p0299, p0420, po299, po420, tts

Help with engine codes P0299 and P0420

mongs on Feb 1, 2010

Jul 14, 2011 01:06 PM
by mongs

4

19,303

18t, 2001, a4, a6, audi, b5, cat, causing, code, forum, leak, p0420, po420, replaced, returns, tt, vag

Replaced Cat - P0420 returns. Now What?

mwspera on Apr 26, 2009

Mar 2, 2011 02:57 AM
by infamous107

7

6,920

002, 16804, 2002, a4, a6, audi, catalyst, code, coding, faul, fault, mil, p0420, s4, system

Fault code 16804, help.

viktor88 on Nov 4, 2010

Nov 7, 2010 04:13 PM
by Dana @ Ross-Tech

3

7,785

17539, 18t, a4, audi, bad, bank, cat, code, fault, o2, p0420, rear, spacer, threshold, trouble

Some weird fault codes.. Bank 2 o2 on a 2002 1.8T? Quantity Adjuster? N320 valve..?

reject902 on Jul 25, 2010

Jul 29, 2010 11:17 AM
by Pete@ECSTuning

4

4,230

A8 / S8 (D3 Platform) Discussion

001, 16814, 17979, 17983, 2004, a8, audi, audiworld, engine, mounting, p0420, p0430, p1575, tt, valve

CEL on with bunch of new faults

BongoCruiser on Mar 22, 2010

Mar 23, 2010 11:53 AM
by MP4.2+6.0

2

4,440

1996, 2000, 2004, a4, a6, audi, chevy, code, p0420, po420, procedure, testing, throwing, truck, vag, vr6

PLEASE HELP - Turning on code P0420

sbrimlow on Feb 12, 2010

Feb 15, 2010 04:12 PM
by Dana @ Ross-Tech

1

3,267

16683, 2001, 2003, a4, audi, boost, control, d2, p0299, p0420, pressure, range, reached, regulation, vag

P0299 Boost pressure regulation and P0420 Catalyst System

mongs on Feb 1, 2010

Feb 2, 2010 05:36 AM
by Uwe@Ross-Tech.com

3

12,233

01, 2001, 2003, a4, a6, audi, b5, cat, code, forum, o2, p0420, po420, s8, sensor

P0420 Cat or what

Mrider on Jun 21, 2009

Aug 20, 2009 08:28 AM
by JWhalen123

3

6,775

1999, 42, 99, audi, b1, bank1, cat, diagnose, efficiency, mazda, mazdap0420, miata, p0420, suburban, threshold

P0420 Bank 1 Efficiency Below Threshold

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win_r6_02 on Nov 24, 2008

Jul 30, 2009 02:30 PM
by Imola a4

18

39,287

001056, 002, 20, 20tfsi, a4, audi, b6, blown, cat, o2, p0420, p0420002, sensor, tfsi, tirar

BLOWN MY CAT????AUDI A4 B7 2.0TFSI

edwardsline on Feb 18, 2009

Mar 14, 2009 12:24 AM
by initialA4

2

2,671

2000, a6, audi, codes, engine, p0420, p0430

I never get any fvcking breaks. Ever. Audi is telling me my car is throwing hard faults

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audikillsbmw on Oct 13, 2008

Oct 13, 2008 06:27 PM
by BernieBenz

16

2,721

P0420/P0422...

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momotoTTe on Sep 20, 2008

Sep 20, 2008 03:58 PM
by MCPaudiTT - DEFCON 1

13

3,114

02, 16804, a4, audi, audiworld, cel, front, o2, oxygen, p0420, replacement, sensor

CEL reveals code P0420/16804. just swap out front O2 sensor?

heateris on Sep 14, 2008

Sep 14, 2008 10:53 AM
by heateris

0

2,159

quick question.I have a p0420 code and all the readiness have pass, can i pass inspections?

believeryes on Jul 1, 2008

Jul 1, 2008 08:00 AM
by believeryes

2

1,107

NY / NJ / CT Discussion

01, 16487, 16500, 20, 3510, cabrio, code, cylinder, intermittent, misfire, multiple, p0103, p0420, p0442, rosstech, vw

02 VW Cabrio 2.0L codes...

Shaun on Mar 26, 2008

Mar 27, 2008 05:27 AM
by Shaun

2

2,039

A4 (B5 Platform) Discussion

01310, 156a, 16804, 3500, 4b0, 4z7, 887, 919, 927, allroad, audi, b, catalyst, control, level, module, p0420, system

Does anyone have an experience with these codes? If so, what was the solution.

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Tattoo on Feb 21, 2008

Feb 22, 2008 02:22 AM
by Audiot

11

9,965

Audi allroad

06, 20t, a4, aeb, audi, code, dts, lifestyle, long, p0420, po420, price, ride, safe, trip, v35, vagcom

What can be wrong if I get P0420 Engine Check Code - Catalyst efficiency low bank 1

kgrig on Feb 17, 2008

Feb 17, 2008 08:04 PM
by Audi_kraut

6

14,654

2001, 20100663, 28, 28quattro, a6, audi, catalytic, converter, p0420, p0430, programming, quattro, system, tsb, update

2001 2.8 30v tip: shop won't install my magnaflow or aftermkt cats, help plz [pics]

loustylez on Dec 18, 2007

Dec 18, 2007 10:53 AM
by Carson@RiversideAudi

9

1,497

A4 (B5 Platform) Discussion

P0420 Popped up after I broke 100k...

Pablohippie on Aug 2, 2007

Aug 3, 2007 09:57 AM
by Tgr_Clw

7

1,941

043, 20, 2002, 820, 8n0, 8n1, 920, 980, cylinder, jetta, mercedes, misfire, no, p0420, part, r350

DTC codes i'm trying to hunt down and fix. i'd love ideas on how!

phiberoptik26k on Jul 11, 2007

Jul 12, 2007 04:51 PM
by phiberoptik26k

7

2,317

CEL - P0420 - Bank 1 - lacking from search...

bcart82 on Jun 17, 2007

Jun 17, 2007 05:52 PM
by bcart82

7

3,431