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02, 0420, 05, 2002, 24, a4, audi, catalyst, code, codes, efficiency, p0420, p0430, po420, trible, v6

codes p0420 and p0430 on my a4 2.4 v6

scanny1 on May 12, 2012

Mar 26, 2014 11:26 AM
by pa4ul

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6

7,699

01, 02, 18, 18t, a4, audi, b6, code, engine, lifestyle, p0420, po420, price, turbo, v35

'01 1.8T Check Engine Light / Code P0420

eelpie on Dec 26, 2010

Jan 27, 2013 06:20 PM
by M3Armand

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1

3,476

01, a4, anti, audi, b6, code, didnt, diy, ecu, fouler, oxygen, p0420, p420, po420, reflash, sensor, trick, work

p0420 code completely confused HELP PLEASE!!!!!!!

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Multi-page thread

1 2)

justyk31011 on Sep 3, 2012

Sep 18, 2012 11:51 AM
by justyk31011

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14

13,289

04, 0420, 18t, 2000, 2004, a4, a6, audi, catalyst, code, codes, engine, fault, navigation, p0420, po420, system, threshold

2004 audi a4 quattro 1.8t diagnostic trouble code p0420

mckinn43 on Nov 30, 2011

Dec 7, 2011 02:01 AM
by MTS

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1

6,221

Angry

18t, 2002, a4, audi, catalyst, code, miles, monitor, p0411, p0420, p0420034motorsport, po420, ready, reset, rode

Need Help with code P0420!!!!!!

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Multi-page thread

1 2 3)

ahsaw on Sep 6, 2008

Sep 30, 2011 09:06 AM
by vito914

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25

20,510

02, 03, 0420, 18t, 2002, 2003, a4, audi, b6, cel, code, p0420, po420, sensor, that

CEL code P0420

shiles831 on Sep 11, 2011

Sep 12, 2011 01:29 AM
by shiles831

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2

3,533

2002, 2004, a4, audi, bank, cat, catalytic, check, codes, converter, engine, flow, high, light, loss, po420, power, show

Catalytic Converter?

sharpshooterz98 on May 10, 2011

May 10, 2011 08:23 PM
by rummy

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1

1,282

0420, a4, audi, code, drive, focus, ford, frive, it, long, p, p0420, po420, safe, zx3

P0420----Can I still drive it???

Postah on Aug 7, 2006

Dec 26, 2010 05:10 PM
by caodan2010

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7

16,787

01, 18t, 2001, a4, audi, code, diagnose, diagnosing, forum, p0420, po420, quattro, sensor, turbo, upstream

Help diagnosing p0420

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Multi-page thread

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hauptjr on Apr 16, 2010

Apr 18, 2010 09:11 PM
by turbo kraut

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12

3,353

a4, audi, b6, car, code, drivable, driveable, po420

Po420

drifter22 on Apr 11, 2009

Apr 19, 2009 09:39 PM
by drifter22

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5

1,231

2000, 2001, a4, a6, audi, b6, bank, catalyst, code, diagnostics, p0420, po420, quattro, system, threshold

P0420 Bank 1: Efficiency Below Threshold CEL on 2001 Audi A6 Avant

win_r6_02 on Nov 24, 2008

Nov 25, 2008 05:32 PM
by win_r6_02

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6

10,791

01, 18t, a4, a6, audi, b6, bad, cat, cel, clear, code, codes, fix, p0420, po420

CEL code P0420?!

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Multi-page thread

1 2)

Mike02A4 on Feb 17, 2008

Sep 29, 2008 05:45 PM
by ahsaw

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17

22,074

16804, 420, a4, audi, audiforums, cat, code, po420

Cat Code PO420 / 16804

madrasautoparts on Jun 6, 2008

Jun 7, 2008 07:28 PM
by CRAZYHAWK

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1

1,272

32003, 420, 441, a4, audi, check, code, codespo441, engine, flow, incorrect, light, line, po, po420, po441, purge, vacuum

Help-Check Engine PO 441 and PO 420

Shaudi on Apr 26, 2008

Apr 28, 2008 11:37 PM
by wheels_06

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2

2,611

2001, 28, a4, a6, audi, catalytic, check, code, converter, engine, faults, light, manual, manually, po420, reasons

2001 Audi A6 Check Engine Light Code PO420

DoubleFace on Apr 24, 2008

Apr 26, 2008 11:22 AM
by AudiTech616

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1

3,490

1, 2001, 420, 99, a6, audi, bank, check, code, codes, engine, light, obd, po420, problems, scanner

2001 Audi A6 Trouble shooting PO420

DoubleFace on Apr 24, 2008

Apr 25, 2008 03:06 PM
by polancho

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4

2,995

a4, audi, code, diode, fault, foulers, installing, mod, o2, p1114, pipe, po420, sensor, test, trick

Couple of codes. related to test pipe?

USSCOTT on Nov 15, 2007

Nov 19, 2007 10:46 AM
by USSCOTT

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5

1,934

18t, 2002, 2004, a4, audi, cel, fix, flash, fouler, foulers, o2, p0420, plug, po420, sensor, spacer, spark

CEL P0420

pv1127 on Jul 27, 2007

Jul 27, 2007 09:15 PM
by pv1127

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6

1,846

a6, audi, cat, code, delete, error, f350, ford, fouler, p0420, plug, po420, removed, repairing, spark, trick, vw

cat delete=P0420...Please help

TURBEAU on Feb 7, 2007

Feb 7, 2007 06:16 AM
by BadLuckAudi

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4

6,591

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