Catalytic Converter

>humma@hummahumma.com wrote:
>
>> Apparently a failing DI cassette fouled my catalytic converter (
>> 2001 9-5 SE) and the engine check light stays on because " the oxygen
>> sensors are getting a wrong reading" ( from dealer). Service manager
>> quotes about $1100 plus to replace, however feels I can continue to
>> drive without any ill effects.
>>
>> Q #1: I don't suppose there is anything that can clear a fouled
>> converter ???
>
>Not AFAIK.
>
>
>> Q#2: Will the incorrect Oxygen sensor affect something like gas
>> mileage or can I ignore until it's time for my next emissions testing
>> (in Sept 2010)
>
>Oh it might very well affect mileage. It probably won't kill anything
>though. Try smelling the exhaust when the engine's hot and see if you can
>smell unburnt hydrocarbons.
>
>Graham
My wife might think I'm trying to off myself over the bill if she
sees me doing that !
 >> Stay informed about: Catalytic Converter 

johannes wrote:

> humma.RemoveThis@hummahumma.com wrote:
> >
> > Apparently a failing DI cassette fouled my catalytic converter (
> > 2001 9-5 SE) and the engine check light stays on because " the oxygen
> > sensors are getting a wrong reading" ( from dealer). Service manager
> > quotes about $1100 plus to replace, however feels I can continue to
> > drive without any ill effects.
>
> There may be 100's other reasons why the lambda sensor gives the
> wrong reading.
>
> > Q #1: I don't suppose there is anything that can clear a fouled
> > converter ???
>
> It's probably not fouled.
>
> > Q#2: Will the incorrect Oxygen sensor affect something like gas
> > mileage or can I ignore until it's time for my next emissions testing
> > (in Sept 2010)
> >
> > Comments ??
>
> Try another dealer. A vacuum leakage or a badly connected air mass
> sensor can give the same symptoms.
>
> I never like to send my car to the dealer with undiagnosed illness;
> it's like writing a blank cheque.

Or even try a competent independent. I've always done that. They've never
let me down.

Graham
 >> Stay informed about: Catalytic Converter 

What about the ODB II whose code reads Catalyic converter failure ?

On Sat, 27 Sep 2008 21:11:48 +0100, johannes
wrote:

>
>
>humma@hummahumma.com wrote:
>>
>> Apparently a failing DI cassette fouled my catalytic converter (
>> 2001 9-5 SE) and the engine check light stays on because " the oxygen
>> sensors are getting a wrong reading" ( from dealer). Service manager
>> quotes about $1100 plus to replace, however feels I can continue to
>> drive without any ill effects.
>
>There may be 100's other reasons why the lambda sensor gives the
>wrong reading.
>
>> Q #1: I don't suppose there is anything that can clear a fouled
>> converter ???
>
>It's probably not fouled.
>
>> Q#2: Will the incorrect Oxygen sensor affect something like gas
>> mileage or can I ignore until it's time for my next emissions testing
>> (in Sept 2010)
>>
>> Comments ??
>
>Try another dealer. A vacuum leakage or a badly connected air mass
>sensor can give the same symptoms.
>
>I never like to send my car to the dealer with undiagnosed illness;
>it's like writing a blank cheque.
 >> Stay informed about: Catalytic Converter 

humma.TakeThisOut@hummahumma.com wrote:

> What about the ODB II whose code reads Catalyic converter failure ?

Presumably means there must be some kind of sensor 'downstream' from it.

But so what ? I thought that was established anyway. I was serious about
smelling for unburnt hydrocarbons, that means unnecessary fuel consumption
due to rich mixture. If the mixture's weak then you'll get
pinging/pinking/knocking. One of my 9000s did that anyway briefly when first
started. The owner's manual says ignore it, the ECU is just 'learning' so it
would have to be long term to be a problem. Long term pinking will destroy
an engine.

Graham
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