There could be a number of things that make the slow down light come on. Don't jump to any conclusions until the car is checked out. It could be something as simple as a bad sensor.thanks Travis,
but what can cause the catalytic converters to overheat? and when you say major problem do you mean they need to be replaced or the Engine is causing the overheating?
i don't have a OBD2 but i will get one soon.
Also, the EPA OMS can help with enforcing this. It is a US Federal Law that Maserati stand behind their products and protect our environment.Maserati's policy on this usually seems to be that they look for any scrape, scratch or dent and try to say that the bump or vibration loosened the material and caused its destruction. This is one issue that they seem to have difficulty stepping up to the plate on.