I have a audi a4 . codes out 2101 and 638, both refer to throttle range performance, have replaced throttle body. cleared dtc"s relearned basic settings. runs fine. no problems, can drive all day all night, in the morning when outside temp is between 40-45 degrees (cold) start car codes back out same code 2101, has happened twice, when I go home from the steelership, at night. tempature between 64 to 68 degree, clear code, car starts fine, without even basic settings, relearn, so I kinda ruled out ecu. have checked all pin connectors and wires between tbody and ecu. , there has to be another issue, I have no clue. have checked identi fix, and at dealership for any related tsb"s and found nothing. a couple of posts from some guys in europ having same issue, but no correction has been posted, was wondering if any one has had this issue or similar with electronic throttle body,?