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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 05-12-2012

03-26-2014 12:26 PM
by pa4ul

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6

7,517

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 12-26-2010

01-27-2013 07:20 PM
by M3Armand

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1

3,282

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 09-03-2012

09-18-2012 12:51 PM
by justyk31011

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14

12,725

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 11-30-2011

12-07-2011 03:01 AM
by MTS

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1

5,869

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 09-06-2008

09-30-2011 10:06 AM
by vito914

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25

19,786

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

CEL code P0420

shiles831 on 09-11-2011

09-12-2011 02:29 AM
by shiles831

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2

3,451

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

Catalytic Converter?

sharpshooterz98 on 05-10-2011

05-10-2011 09:23 PM
by rummy

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1

1,212

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

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

Postah on 08-07-2006

12-26-2010 06:10 PM
by caodan2010

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7

16,464

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

1 2)

hauptjr on 04-16-2010

04-18-2010 10:11 PM
by turbo kraut

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12

3,132

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

Po420

drifter22 on 04-11-2009

04-19-2009 10:39 PM
by drifter22

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5

1,143

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 11-24-2008

11-25-2008 06:32 PM
by win_r6_02

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6

10,360

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 02-17-2008

09-29-2008 06:45 PM
by ahsaw

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17

21,611

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

Cat Code PO420 / 16804

madrasautoparts on 06-06-2008

06-07-2008 08:28 PM
by CRAZYHAWK

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1

1,175

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 04-26-2008

04-29-2008 12:37 AM
by wheels_06

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2

2,446

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 04-24-2008

04-26-2008 12:22 PM
by AudiTech616

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1

3,312

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

2001 Audi A6 Trouble shooting PO420

DoubleFace on 04-24-2008

04-25-2008 04:06 PM
by polancho

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4

2,874

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

Couple of codes. related to test pipe?

USSCOTT on 11-15-2007

11-19-2007 11:46 AM
by USSCOTT

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5

1,846

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

CEL P0420

pv1127 on 07-27-2007

07-27-2007 10:15 PM
by pv1127

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6

1,779

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

cat delete=P0420...Please help

TURBEAU on 02-07-2007

02-07-2007 07:16 AM
by BadLuckAudi

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4

6,177

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