i have 2001 A6 2.7 biturbo
i recently serviced transmission and within a week check engine light came on
i don't recalled the code but it explain "lock-up clutch coupling no power transmission" within torque convertor
car is driving fine. no shifting problem and no gas milege dropping.

mechanic checked fluid level and everything seems to be fine.
it is just driving me insane....

anybody have any idea????????

 

the code is important

 

Did you fill it to the proper level with the correct fluid? That code refers to a failure in the lockup torque converter. If the solenoid is working ok and fluid is ok your gonna need a new torque convereter.

 

Oh no the dredded torque converter code strikes again

All because of a failed little O-ring, its so sad

 

what do you know about failed o-ring?
is that common in audi tranny?
and what kind of performance is it gonna affect?

 

It means you need a new converter

Not to sure about perf wise

 

It will effect gas milage during cruise situations. It can also damage the transmisiion. The torque converter has some slippage. The lockup eliminates that slippage causing all engine power to be transfered to the transmission. It also reduces heat builtup in the torque converter.