[V8] flashing cat light

Ed Kellock ekellock at gmail.com
Wed Feb 18 19:42:24 PST 2009 

Exactly.  I had the same issue.  It would start flashing way before it was
likely that the cats were overheating.  

You can take out the passenger side carpet and console side piece and get to
the wires from the sensor that run through the floor.  That is how I was
able to determine that there's a short... I could get the light to go out by
wiggling them.

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 8:35 PM
> To: V8 at audifans.com
> Subject: Re: [V8] flashing cat light
> 
> 
> I did notice during our recent snow that if I drove through 
> an area where the snow was deep enough to touch the bottom of 
> the car the cat light would go out for a while.  I figured 
> the snow cooled things down enough to temporarily make the 
> light go out.
> 
> However, what still confuses me is that the cat light is 
> flashing from the moment I start the car.  It couldn't 
> possibly be overheating that quickly. Maybe the vibration 
> from the snow hitting the bottom of the car was able to 
> wiggle the wires into making contact for a short amount of time??
> 
> Seamus
> 
> On Wed, Feb 18, 2009 at 7:02 PM, Ed Kellock 
> <ekellock at gmail.com> wrote:
> 
> > 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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