Lexus SC Active Air Flap Fault

I'm having a headache with my 2009 Lexus SC with a gasoline engine. The check engine light keeps popping up, and I've noticed the engine seems to be running hotter than usual – even overheating at times. I scanned the OBD, and it’s pointing to a fault in the active air flap system. I've read online that this system manages the air intake to optimize engine temperature - part of the thermal management, I guess. Has anyone else run into this? I suspect the electromechanism that controls the flaps is buggered. I'm trying to get a handle on what I'm facing here before I take it in. Any advice or shared experiences would be greatly appreciated!

4 comment(s)

I also drive an Lexus SC and have encountered a similar problem relating to the active air flap system. The check engine light illuminated, suggesting a possible issue with the cooling system. Initially, it was difficult to pinpoint, but further diagnostics revealed that the air flaps were not functioning as expected. These flaps play a crucial role in thermal management by controlling airflow to the engine. There could be fault codes. Did you check those?

Thanks for the reply! Yes, I did get a fault code related to the air flap system. I suspect it is the electromechanism. When you had the problem, did your engine overheat? How did you resolve it? I'm trying to gauge how urgent this is and whether it's something I might be able to tackle myself, although my mechanical skills are pretty basic.

Indeed, overheating was one of the symptoms I noticed as well. Given that the cooling system relies on proper functioning of the air flaps, a defective electromechanism can certainly lead to that. In my case, I opted to bring it to a certified workshop. They confirmed the diagnosis and replaced the faulty component. I strongly recommend seeking professional assistance, considering the potential impact on engine health.

Thanks again for the insight! I appreciate you confirming my suspicions and sharing your experience. Based on your advice, I took it to my trusted mechanic. Sure enough, the diagnosis pointed to the electromechanism controlling the active air flaps. The repair, including parts and labor, set me back about 590€. The check engine light is now off, and the car is running at the correct temp. So, crisis averted!

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