Need feedback. My '11 335i may be showing symptoms of HPFP problems. When pressing accelerator, car hesitates and engine tack revs above 5K. Car does not move faster or accelerate at all. A yellow icon of car with exhausts displays on dash every time I try to press accelerator. Feels like I am driving my old 328i where there is a lag in acceleration. Car only has 2750 miles. Bringing car to dealer to check on Tuesday. Is this a symptom of turbo or HPFP problems?