Hi guys, I have a 64 plate 1.3 multijet diesel. The engine management light came on and i did a scan check which shows error code P2563...Boost position sensor A circuit Range/Performance. I located the sensor at the rear of the engine and removed and cleaned it, cleared the fault code and it reappeared when i ran the engine up to boost revs. My question is does these units need replacement even after cleaning, do they actually fail or is it just a clean?