hi,have got a passat 1.8 20v turbo "2oo1",have changed the temp sender unit,and had fault codes reset.problem is the engine management light has come back on with no fault evident.have been told it is a dry connection in one of the multiplugs in the engine bay.if anyone has experienced this problem and cured it,could you please give me an idea to which one it could be and where it is located.any and all input is greatly appreciated.thankyou