2006 207 HDI GT 110 Couple of questions

[RolfHarris]

Hi Guys..

Just purchased a 2006 207 HDi GT got 25500 miles ..
1. Got the service warning triangle comes on once I've starting driving
checked oil level, checked windscreen washer fluid level all ok
Haven't checked remote battery yet? service spanner was on, I am having serviced next week, I've reset the service indicator but the triangle service warning light stays on.
what are all the possible problems associated with the service warning triangle

2. get a clutch "Judder" when pulling away at low rpm, when pulling away at a higher RPM no vibration, does the Dual Mass Flywheel fail on the 207? is there any Technical Service Bulletins on Clutch problems..

Thanks for any help...

Rolfy..