[V8] flashing cat light

[Ed Kellock]

There is a sensor in the back outside corner of the passenger side cat.  It
is a heat sensor to tell you when/if the cats might be overheating.
However, if the wire to the sensor is broken for any reason, the light will
flash.  Mine had an intermittent short and would flash almost all the time.
I was able to wiggle it and make it stop so I knew it wasn't a temp issue.  

In other words, you may not have an issue with your cats at all.

I don't believe the warm start issue is related.

There are diagnostics for the cat sensor.  There's a relay in the passenger
side footwell that controls the sensor.  If you remove the relay, the light
will no longer flash.  It will still come on initially when you turn the key
on and then go out just like normal when you start the car.

Ed

> -----Original Message-----
> From: v8-bounces at audifans.com 
> [mailto:v8-bounces at audifans.com] On Behalf Of Seamus O'Carey
> Sent: Wednesday, February 18, 2009 7:56 PM
> To: V8 at audifans.com
> Subject: Re: [V8] flashing cat light
> 
> 
> I have pretty much the same issue.
> 
> Your options are:
> A. Remove them, but unless you have the equipment to remove 
> them yourself, you'd have to find a shop willing to do the 
> work.  It's a HUGE fine if they get caught, though, so most 
> won't want to. B. Rather than remove them you can just gut 
> them (jam a rod through them over and over until nothing is 
> left inside), but again you'll have to find a way to remove 
> and replace them.  If our cats are bolt-ons it won't be a 
> problem, but if they're welded in place you'll have the same 
> trouble as option A.
> 
> I was thinking about just gutting my cats if it turns out 
> they're just bolted in place, but it seems like cats are 
> usually welded at least at one end.
> 
> Seamus
> 
> On Wed, Feb 18, 2009 at 5:42 PM, Curtis Helton 
> <fatboy03 at gmail.com> wrote:
> 
> > Have had that every since I bought the car. It runs great. No 
> > hesitation, stuttering, ect. Only thing it does every once 
> in a while 
> > is it will not start and stay running after it's warmed up. 
> I have to 
> > give it some gas to keep it running.
> > After I take off in it, it's fine.I did VAG it and their 
> were NO codes.
> >
> > Several questions here.
> >
> > 1. Can I get rid of the cats all together w/o to much trouble? 
> > Thinking I would like a little louder exhaust than stock. Also no 
> > emission testing. So, no worries there.
> >
> > 2. As far as how it doesn't want to stay running while 
> trying to start 
> > it after it's warmed up.Would that have anyhing to do with the cats?
> >
> >
> > TIA,
> >
> > Curtis
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