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Thanks for the tip, will try this. I tried resetting it a couple of days ago by disconnecting the battery then reconnecting but it didn't do anything. My local garage have ordered a new battery as my previous research had led me to believe it could be this - I'm not so sure now - but as they've ordered it in I'm going to replace it anyway as it's about 4 1/2 years old and could be this. Otherwise, does anyone else have any ideas, some people are talking about solder joints, does anyone have any ideas about how to do this??
Thanks for this, by process of elimination, and exhaustive searching on the net, I think it may be the battery and this afternoon a friend and I went through the rather over the top procedure of getting access to the battery and am having this replaced tomorrow. I think this should solve it as the PCM came on earlier today when I'd only be in the car a couple of minutes, so it wasn't even as if the battery had a long time to charge. I'll let you know if this solves the problem and if anyone else has any other ideas in case this doesn't solve the problem I'd love to hear them.
Hi All Having recently suffered the now all to familiar coolant leak issue, and paid for the repair myself - as Porsche wouldn't pay a penny - I came back from a weeks holiday to another problem with my 2006 Cayenne S which has only done approx 40,000 miles; After about 15 minutes in the car I noticed the screen on the PCM would flicker for literally a split second probably every minute, when doing this it was literally a blink and you'll miss it type of thing where the screen looked exactly the same before and after the flickering but after it had done this a few times I turned the screen