Engine started misfiring recently at engine cold start and from hybrid transition to engine startup. Engine light came on with reports codes P0302 and P0304. Additionally, another error code P0607 also was detected. Had a certified mechanic assess the car and replaced the four coils for the CT200h. No change in issue. New issue developed this past Monday with an engine temperature light flashing on. Stopped and put a half liter in the coolant reservoir. Engine temperature light did not come back on. Took the car to a certified mechanic and told him to pressure test the coolant system. The mechanic confirmed the head gasket is blown. In the Lexus CT200h online forum there is a clear and compelling case that the EGR malfunctioned and directly contributed to the head gasket blowing. This car has approximately 128,000 miles. I would encourage you to read the Lexus CT 200h forum.

- Nicholls, GA, USA

Engine rattles due to head gasket failure and subsequently stops working and defaults to -??service hybrid system-?? this can occur while driving and cause a collision.

- Los Angeles, CA, USA

The head gasket is leaking. After speaking with several mechanics who work on this type of car and issue and they have all said that "3rd generation prius engines all have this leaking head gasket problem, no other generation hybrid engine from Toyota or Lexus does". why wasn't this recalled? I don't understand how Toyota and Lexus get away with a shoddy product that creates a $5-8K expense on their vehicles that is a design flaw and issue with this generation hybrid engine. My car is only worth about $10K, so paying to fix this seems like a bad choice. However, I have also been told that often when people do pay to fix it they have to come back as the engine block ends up needing full replacement, which is an additional $3K.

- Oakland, CA, USA