Hello all. I also have the V157 flap motor fault on my 04 Tdi90 / ATL. I did have a bit of luck clearing the code for the EML to extinguish, but no longer could the fault be cleared, so I removed the flap motor on Sunday for a clean. It was pretty oily in there, but appeared to clean out OK, and all gear teeth were fine. Both before and after the clean 6v across the motor with the electronics removed actuated the flap smoothy. Once back in the car I was able to clear the code, but alas for only one journey before the light came back on, and again can't be extinguished.
So, I had another removal and clean (not much oil had reappeared). Motor still smooth when tested. But still no reset of the EML light possible. And viewing the flap exposed with a quick run of the engine to turn off again showed no attempt by the valve to move.
So, I guess it's replacement time, but just before I do, I wouldn't be missing a fuse or something silly would I? I'll have a look along the wiring run too - is it obvious which route the wires follow?
Thanks!