'02 Golf GTTDi battery going flat.

Hi there,

I've had a 52 reg gt ti golf for around 6 months now and for the last three months the battery has held no charge. I can drive the car from yorkshire to glasgow and within three hours of being there the battery is completely flat. The alternator is working fine and as such i'm competely lost!!

There are no interior lights on nor any tracker fitted. I've also just recently tried 2 different good batteries with no change in the problem.

I've been told this could be a common fault linked to the oil pressure sensor??

Please help,

cheers, PJ