2004 Beetle Convertible 64,000 miles Transmission shifts good but the check engine light came on dash and said P0841 Transmission Fluid Pressure Sensor?circuit range performance. Car was taken to a transmission shop who replaced the valve body with a used unit (twice) and the light kept coming back on. I took the car to a VW Master Mechanic who re-checked the wiring and decided it had to be the Transmission Control Module. He replaced it, drive it, shifted good, after 15 miles the check engine light came back on. What do we do now?