F355 : 'check engine', 'slow down' and 'abs' signal

Hi,

I have had a 355 GTB (5.2, european model) for 15 days, I drived fast during hours on the highway last week without problem but today I had the 'slow down' light for 10 seconds. I was driving slowly in the street (I was even waiting at a traffic light) when it started to blink, engine was not hot (between 80 and 90 °C).

I continued to drive on my way back to home without problem (15 minutes), when I stopped the car 'slow down' and 'check engine' lights appeared during 5 seconds immediatly after the engine had stopped.

When I started the car today (after 8 days without moving) the ABS light appears a few seconds as well.

The last service has been done 2 weeks ago.

Any idea about what's going on ? Does that sound familiar to anyone ?

I know these signals can be misleading, is there anything I can check easily ?

Thanks.