Hi russelj80,
cheers for that mate. I have read that this is an issue with 8P's as well.
The symptoms on mine are a little different from what I have read the sensor causes, If I leave my car for 24 hours without driving it. When turning over it sounds like the battery is dead, but will start on the 2nd turn.
When warm the flat battery thing is no longer an issue but it will turn over 4-6 times before starting and then start very rough with a shudder. The engine is new, and was changed in Feb this year so I have ruled out any engine issues.
The starter itself when spinning makes a squeak which coincides with the engine turning over.
I'm going to take it back up to the place that fitted the engine, explain what I have read about the issues here and see what they think.
Cheers!