Prius (2004-09) :: 2006 - Coolant Leak - Faulty Head Gasket?

I just bought my 2006 Toyota Prius about a year ago in 2009. It has been treating me LIKE GOLD !!! up to this point. About a month or two ago, the check engine light came on and stayed on along with a big red triangular warning light. I let it go for about a week hoping that it would just go away.

I brought the vehicle into my local Toyota dealership so they can diagnose it.They told me that they had 3 or 4 different "codes" coming from the machine when getting the signals from the check engine light. All the codes were related to the cooling system. They said that they felt that there was "debris" clogging the pathway for the coolant flow throughout the engine. They had recommended a "coolant flush" for the hybrid side as well as the mechanical side. So I took their advice and I had them perform the coolant flushes.

After leaving the dealership that 1st time, the check engine light came back on the next day. I called the same dealership and explained it to them. They asked me to bring it in again. SO I brought it to them a 2nd time. They diagnosed it again. They told me they came up with 2 of the SAME "codes" and 1 that was different, but ALL the codes were STILL related to the cooling system. They explained to me that something was preventing the clear flow of coolant throughout the engine. And since the thermostat was the only major obstacle, they recommended that I replace it. Well, I did. And after I left the dealership that 2nd time, I was praying that this was the last of my Prius issues! The check engine light came back on the next day.