AFS system, Air Flap System?

Tiny
SDAVIS3306
  • MEMBER
  • 2012 HYUNDAI SONATA HYBRID
  • 4 CYL
  • AUTOMATIC
  • 163,000 MILES
Got error message about AFS in December of last year. Now my transmission has started to fail they say due to me not getting the AFS system replaced. I started having transmission problems about 6 or more months ago. Scheduled countless appointments regarding the symptoms I was having with it. Each and every time they would say no it's not your transmission. It's the AFS system. My started shifting funny, kind of jerky. Small but I noticed it right away. Called again to Schedule appointments for it to be seen. Again, they tell me it's the AFS system. I asked them to please just check the transmission because I know you're saying AFS because that's the code you see. I'm asking for transmission to be looked at because that's what I'm feeling. It was ignored again because I declined a repair on the AFS system because I could afford it. I asked could I just get someone to check my transmission. It's sealed and I want to make sure it has what it needs to run efficiently. No one checked it for months and months. They would just go off of the codes it read. Help me please, I want to sue my dealership for negligence. I know I had an AFS code error message. Okay, but how come when I ask specifically about service on my transmission, they said no because I wouldn't and couldn't afford the $1,000.00 plus, repair for the AFS system. Please help me my transmission is failing now I feel due to them not caring about what I ask them to do versus what they wanted me to do about the AFS. I have a right to choose what service I get done on my car, yes?
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Saturday, December 17th, 2022 AT 2:43 AM

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Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,288 POSTS
I need the code number to see what's going on, but I will tell you that the systems are related through the CAN (controller area network) which will affect the transmission operation. Here is some information on the problem.

Description

The AAF (Active Air Flap) is located between the radiator grille and radiator and consists of an actuator and 6 air flaps. The system receives information from EMS, FATC, TCU, MCU and LDC via CAN communication. With this information, the AAF controls the motor properly then the air flaps adjust air flow from radiator grille.

During high-speed driving, it will reduce the air resistance by closing the air flaps. This improves fuel efficiency and enhances driving stability. If overheating occurs, the system will open the air flaps to drop the temperature.

During the A/C operation, the system will open the air flaps to maintain the refrigerant pressure. The system will close the air flaps to warm up the engine rapidly during a cold start.

So, the car will not operate correctly with this problem. I know it sounds silly but that's the way computerized cars work, I have included how to change the AAF actuator out in case you want to do the repair yourself to save some money. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.
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Saturday, December 17th, 2022 AT 11:56 AM

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