Ever since the dealer fixed my def injector and hose my car seems to be having issues - the 2100 code has not presented itself in the last few weeks although I have felt the engine completely cut out quite briefly on a few occasions - I have been driving on icy roads but this anomaly did not appear to be my tires slipping - I just assumed that since the 2100 code is related to my throttle this could be the culprit -