2001 CEL Codes - How To?

[Cody Forbes]

You need some sort of scan tool but it doesn't have to be a VAG tool. Any OBDII reader works. You may find you get "Manufacturer specific code" and have to google it to get a real answer. That said, buy a Ross Tech VAG-com if you can afford it and if you can't, save up for it. 

You'll have to check the secondary air system for any leaks but also the "combi valves" do fail from time to time. The secondary air pump system uses these plastic corrugated tubes that are very very fragile and sometimes just fall apart on their own. With the VAG-com tool you can run output diagnostic tests that will help point you in the right direction. Also, the pumps are electric and typically low which means they are susceptible to water ingression from large puddles and sometimes the housings fall apart from vibrations and will cause this code. If you tell us which engine this car has I can tell you where the pump is.

-Cody (mobile)

On Jan 1, 2012, at 4:56 PM, Douglas Fifield <douglas.fifield at gmail.com> wrote:

> Gents and Gentiles,
> 
> My GF has a 2001 A4 1.8 Tip that has had a lot of issues.  Most
> recently had a new short block put in.  Ever since, it has been
> throwing CEL codes that point to "insufficient flow, secondary
> airpump."  Since my UrS6 runs an AAN engine, I am unfamiliar with this
> system.
> 
> So, two questions.  Is there a way on the 2001 A4 to read the codes
> without a VAG tool?  And, two, anyone familiar with the secondary
> airpump system and how it might be addressed?
> 
> All thoughts welcome.
> 
> -- 
> Douglas in MN
> 95.5 Audi S//6 Avant
> 08 Prius Touring (50 mpg reg)
> 73 BMW R60/5 mit Toaster Tank
> 82 BMW R100RT mit Russkie Sidecar
> ABC# 11822
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