2004 Audi A4 3.0 V6 P0431 DTC

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Apexmaster33

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hello
i have a 2004 Audi A4 Quattro 3.0 v6 6 speed manual gear box
yesterday i got a CEL on scanned car and got P0431 code? was bank 2 on the driver side or passenger side? what exactly does this code mean?
P0431: Warm Up Catalyst Efficiency Below Threshold (Bank 2)
 
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Bruce

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Searching the web, one finds the following:

A code P0431 may mean that one or more of the following has happened: The catalytic converter is no longer functioning properly; An oxygen sensor is not reading (functioning) properly; There is an exhaust leak.

Read more at: https://www.obd-codes.com/p0431
Copyright OBD-Codes.com
The code is stating that the oxygen content of the exhaust is not what is expected.

For further help, please post a complete VCDS Autoscan.
 
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Uwe

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I've changed thread topic to something more meaningful than "PCM Fault Code". :)

-Uwe-
 
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Jack@European_Parts

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2004 Audi A4 3.0 V6 P0431 DTC
hello
i have a 2004 Audi A4 Quattro 3.0 v6 6 speed manual gear box
yesterday i got a CEL on scanned car and got P0431 code? was bank 2 on the driver side or passenger side? what exactly does this code mean?
P0431: Warm Up Catalyst Efficiency Below Threshold (Bank 2)​




2004 3.0 V6 cars had update programming codes for warm up CAT codes such as aforementioned.

An auto-scan will help determine if that is indeed the case when we see the firmware level posted.

Primary CAT efficiency below threshold is what it means when amplitude measurement using OXS sensors forward and afterward are compared to determine the CAT exothermic reaction to scrub CO.​
 
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