There is a recall on failures with this system on some of the 2.8 years
and possible others. Even if you year is not covered it still should be
covered because it is a component of the pollution control system. My
son had his repaired a year ago at the dealer at no cost. It was an A4
'98.5 2.8. (replaced with an '06 A4 2.0TQ6M)
Jims Audi wrote:
> On Mar 11, 8:05 am, "dave AKA vwdoc1" <vwdoc1nos...@[EMAIL PROTECTED]
>
> wrote:
>
>> If the Secondary Air Pumps are low then I would guess water or ice in
the
>> system stopping air flow possibly due to other issues.
>>
>> "JimA8L2001" <jim.rodg...@[EMAIL PROTECTED]
> wrote in message
>>
>>
news:dc6e8c71-6188-41d6-9c41-b5b2f7851853@[EMAIL PROTECTED]
>>
>>
>>
>>
>>> I'm getting codes 0491 & 0492 which are right and left bank secondary
>>> air system failures.
>>>
>>> Once the engine is warm, if i clear the code. They don't come back.
>>> If it is really cold, I get the code shortly after starting, but again
>>> if I clear it, it won;t come back.
>>>
>>> Without Audi specific test equipment, what can I do to trouble shoot?
>>>
>>> Fuse is good, vacuum lines all look good.
>>>
>>> The other components are the blower, ECM, Solinoid, combi-valves. I
>>> get both the righ and left banks so I believe it to be a fault in a
>>> part of the system that will throw both faults. Don;t think it could
>>> be a simultaneous right and left combi-valve failure.
>>>
>>> No other codes. 2001 A8L, 4.2L AUX Engine.
>>>
>>> Any thoughts?- Hide quoted text -
>>>
>> - Show quoted text -
>>
>
> Had the same problem on my 2000 A6 2.7T. In my case it was the sucker
> valve (vacuum booster valve). This caused condensation to build up in
> the PCV and secondary air system which froze when it got cold. The
> valve I spkoe of is only on the 2.7 and 2.8 engines (I believe) but
> you probably have the same condition. I went through 2 secondary air
> pumps too.
>
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