I asked this in the model specific section but I'll ask it here too since I'm not getting a response over there. After some searching around here, it appears that I'm having a similar slow down light problem to others that indicated a possible faulty thermocouple ECU (or the Catalytic Control Unit in the parts manual). I never lose power when the light comes on and it's rare and intermittent when it does come on. I pulled the board in the trunk and the ECU looks like a box you can't take apart to test/troubleshoot. Is there anything that can be checked? Or are we stuck just replacing and hoping....at a cost of $763.50 via Ricambi?