Crankshaft position sensor code misdiagnosis

Engine hard to start, rough idle then ran smoother after shift to second gear. Slowing to stoplight, brake pedal shudder, erratic return to idle. Full stop acceleration hesitates then kicks smooths out again. Next day seem to return to near normal performance except the brake shutter, a week later the check engine light on solid. Autozone was half a mile away, OBD test crankshaft position sensor code electrical malfunction. Replaced twice already, replaced second one February, dropped off at shop I use, told them it was the crankshaft position sensor. Called me said an L1 ASE mechanic will be scheduled to diagnosis it. Next day check engine light was off, my best friend called panicked, his computer crashed, internet addict, lol. Decided to risk five mile drive.