A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004

Auto Zone OBD2 codes

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Old

Sep 15, 2007 | 12:17 PM

#1

a6killa951

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Auto Zone OBD2 codes

Car:2000 A6 2.7t quattro 6spd 93k miles
Tool:Auto zone OBD2 code scanner
Codes:P0421-Warm Up Cat Efficiency Below Threshold (Bank 1)
P1606-Auxiliary in and out
P1139-Fuel Air Meter
P1137-Fuel Air meter

Want to know what parts these codes refer to. What I need to replace. Thanks guys!

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Old

Sep 15, 2007 | 06:37 PM

#2

BoneDaddy

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From: KY

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the first is a catalytic converter-related issue...

no clue on the second, the third and fourth could be many things, but I'd start by checking vacuum lines and the mass airflow sensor

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Old

Sep 15, 2007 | 09:51 PM

#3

a6killa951

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I'll check all the vac. lines and clean the maf........

Would I most likely need a new cat?

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Old

Sep 15, 2007 | 09:52 PM

#4

a6killa951

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Many views but no input! Help a fellow audi owner out =)

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Old

Sep 16, 2007 | 09:38 AM

#5

BoneDaddy

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I'm not too sure

never had that problem myself, it could be a sensor, but from what I've heard it looks like it might be time for a new cat.

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Old

Sep 16, 2007 | 05:33 PM

#6

Felk_2.7T

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P1139 and P1137 are your...

O2 sensors...the front ones...been down that road, but you might want to get a VAG to check...

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audi, autozone, codes, vag

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