Twice in the last month, my 99.5 2.8 A4 has refused to start. Turns
over normally, but simply refuses to fire. In both cases, the failure
occurred shortly after the car had been running, fully warmed up, and
motor then motor shut down. Waiting 15-20 minutes after the failure
resulted in normal starting; and the engine, once started, always runs
perfectly. It was raining both times as well.

The DTC is 16706, PO 322--"no signal from speed sensor", which appears
to be the same thing as the crankshaft position sensor. My mechanic
obviously suspects this device, which is unavoidably logical. I'm just
wondering if others have had a similar failure.
Dave

 

Sure the old 'Heat soaking' issue. Been around since the type 44s.

Tony
'91 100Q 5spd

Interious wrote:
> Twice in the last month, my 99.5 2.8 A4 has refused to start. Turns
> over normally, but simply refuses to fire. In both cases, the failure
> occurred shortly after the car had been running, fully warmed up, and
> motor then motor shut down. Waiting 15-20 minutes after the failure
> resulted in normal starting; and the engine, once started, always runs
> perfectly. It was raining both times as well.
>
> The DTC is 16706, PO 322--"no signal from speed sensor", which appears
> to be the same thing as the crankshaft position sensor. My mechanic
> obviously suspects this device, which is unavoidably logical. I'm just
> wondering if others have had a similar failure.
> Dave
>

 

Am I correct in assuming that replacing the sensor fixes the problem?

>Sure the old 'Heat soaking' issue. Been around since the type 44s.
>
>Tony
>'91 100Q 5spd
>
>Interious wrote:
>> Twice in the last month, my 99.5 2.8 A4 has refused to start. Turns
>> over normally, but simply refuses to fire. In both cases, the failure
>> occurred shortly after the car had been running, fully warmed up, and
>> motor then motor shut down. Waiting 15-20 minutes after the failure
>> resulted in normal starting; and the engine, once started, always runs
>> perfectly. It was raining both times as well.
>>
>> The DTC is 16706, PO 322--"no signal from speed sensor", which appears
>> to be the same thing as the crankshaft position sensor. My mechanic
>> obviously suspects this device, which is unavoidably logical. I'm just
>> wondering if others have had a similar failure.
>> Dave
>>

 

You would be correct in assuming that. Assuming that is, in fact, the
problem which sounds likely to me.

Tony
'91 100Q 5spd

Interious wrote:
> Am I correct in assuming that replacing the sensor fixes the problem?
>
>
>>Sure the old 'Heat soaking' issue. Been around since the type 44s.
>>
>>Tony
>>'91 100Q 5spd
>>
>>Interious wrote:
>>
>>>Twice in the last month, my 99.5 2.8 A4 has refused to start. Turns
>>>over normally, but simply refuses to fire. In both cases, the failure
>>>occurred shortly after the car had been running, fully warmed up, and
>>>motor then motor shut down. Waiting 15-20 minutes after the failure
>>>resulted in normal starting; and the engine, once started, always runs
>>>perfectly. It was raining both times as well.
>>>
>>>The DTC is 16706, PO 322--"no signal from speed sensor", which appears
>>>to be the same thing as the crankshaft position sensor. My mechanic
>>>obviously suspects this device, which is unavoidably logical. I'm just
>>>wondering if others have had a similar failure.
>>>Dave
>>>
>
>