How to Fix Check Active Air Flap System Ioniq


When foreign materials like snow, ice, or debris block your vehicle’s air flap, it can disrupt its operation, triggering a notification. Safely stop your vehicle, remove the obstruction, and wait for 10 minutes before restarting. If the issue persists, schedule an inspection with an authorized dealer or service center.

While driving, I noticed a “Check active air flap system” warning light on my dashboard. Unsure of the cause, I pulled over and searched online with no luck. Consulting my owner’s manual didn’t provide a solution either, so I called a mechanic friend. They recommended checking the fuses and connectors. The fuses were fine, but I found a loose, corroded connector under the hood. After cleaning and securing it, I waited ten minutes, started the engine, and the warning light vanished.

Only for it to come up again after a few minutes. This time, I got on my knees and found debris in the air flap. I removed it and this solved the problem.

In this article, we will explore the meaning of the “check active air flap system”, its causes, and how to fix it. 

What Is an Active Air Flap System and What Does It Do? 

The “check active air flap system” message on a vehicle means that the active air flap system may not be working properly, probably because something is obstructing it. This system helps regulate the temperature inside the vehicle by controlling the airflow through it.

If the system is not working properly, it could cause the vehicle to be less efficient. The message could also indicate a more serious problem with the vehicle’s air conditioning system. It’s important to have the vehicle checked by a qualified technician to ensure the system works properly and to diagnose any potential issues.

These adjustable flaps on the vehicle’s grille can open or close automatically to control the amount of air that flows through the vehicle’s cooling system and the engine bay, by adjusting the airflow.

How to Fix a Malfunctioning Active Air Flap System Ioniq

Various reasons could lead to the malfunction of the active air flap system. 

To fix the Check Active Air Flap System warning message. We will examine the cause of the malfunction and its fix.

Particles or Objects

To fix this,

  • Physically inspect the system for tucked particles and clean contaminants carefully.
  • Clean the flaps and the surrounding area to remove dirt, debris, or any obstructions that might impede their movement. 

Wiring Issues

To fix this; 

  • Inspect the wiring and connection plugs for damage or loose connections. 
  • Ensure electrical connections are secure and free from corrosion. 

Outdated Software

To fix this; 

  • Check with your vehicle manufacturer or dealership for any available active air flap system software updates. Software updates can sometimes resolve system glitches. Please do not disconnect, start, or switch off during the update. 
  • Also, a system reset could clear the error messages. With the OBD2 scan, to identify the error codes. 

Mechanical Damage to The Upper or Lower Active Air Flap System

To fix this; 

  • Check for any damage to the active air flap system, like cracks. 
  • If there is noticeable damage, repair or replace it.

How Does an Active Air Flap System Work? 

The active air flap system works by adjusting the flow of air through a vehicle’s grille or other openings to optimize aerodynamics and engine cooling. Here, I’ve summarized how it typically works in steps: 

  1. The car’s engine emits a high amount of heat that can affect the operation of the whole car. 
  2. The system obtains data about the vehicle’s speed, engine temperature, and other relevant factors. 
  3. The active air flap system features adjustable flaps installed in the grille that allow for the entry and exit of air in the vehicle. These flaps can be opened or closed independently based on the condition of the car.
  • When the vehicle is moving slowly or idling, the flaps may be partially or fully closed, and this reduces the airflow through the grille, which improves aerodynamics and reduces drag. But if overheating occurs, the flap is opened to improve engine cooling. 
  • It will reduce air resistance at higher speeds by closing the air flaps. 
  • During a cold start, the flaps may remain closed to help the engine reach its operating temperature more quickly.
  1. The system continually adjusts the position of the flaps in real-time as driving conditions change. This ensures that the vehicle maintains the right balance between aerodynamics and cooling.

How to Check the Active Air Flap System Hyundai

To check the active air flap system on your vehicle, you can follow these general steps:

Visual/physical Inspection 

First, open the hood of the vehicle. You should then locate the air flap system, which usually locate near the front of the vehicle. Once you have located the system, you should inspect the visible components, including the flaps for any signs of physical damage such as cracks, loose parts, or obstructions such as debris accumulation. In most cases, the flaps will be stuck in a single position, either open or closed.

Clean any dirt or debris if necessary. You should also make sure that the flaps are moving freely.

Scan for Error Codes

Use an OBD-II scanner to check for any error codes related to the active air flap system. If the system detects a malfunction, it will often store error codes to help pinpoint the issue. These codes can guide you or a mechanic in diagnosing the problem.

Pressure Tests

A pressure test is one of the best ways to check the active air flap system. Performing a pressure test on the active air flap system can help identify leaks or issues with the system’s ability to maintain proper pressure.

To perform a pressure test

  • You will need to purchase a pressure testing kit. 
  • You will then need to attach the pressure tester to the designated port or connection port. 
  • Once the tester is in place, you will need to start the vehicle and allow it to idle for a few minutes. After the engine has warmed up, you should then observe the pressure gauge. 
  • Carefully inspect all components and connections of the active air flap system while it’s pressurized. Look for any visible signs of air escaping, such as hissing sounds, bubbles, or the release of compressed air. If the pressure is within the manufacturer’s specifications, the air flap system is functioning properly. A significant drop may indicate a leak in the system. 

Symptoms of A Malfunctioning Active Air Flap System

A malfunctioning active air flap system can manifest various symptoms, depending on the specific issue with the system. Here are some common symptoms to look out for:

Engine Overheating

A malfunctioning system may not properly regulate the flow of cooling air to the engine, leading to increased engine temperatures. This can result in engine overheating, which may trigger warning lights on the dashboard.

Unusual Engine Noise

Malfunctions in the system’s components, such as the flaps or motors, can result in unusual noises, such as clicking, rattling, or grinding sounds, when the system operates.

Reduced Aerodynamic Efficiency

The system is designed to improve aerodynamics at higher speeds by closing flaps. A malfunction might increase wind resistance and more noise when driving at highway speeds.

Decreased Emission Efficiency

Some active air flap systems are integrated into the vehicle’s emissions control system. A malfunction can affect emissions performance and may lead to increased emissions.

Stored Diagnostic Trouble Codes

which can be checked via an OBD II scanner. These codes include:

U1008: Lost communication with radiator shutter (Active Air Flap)

P1235: Active air flap system fails

P059F – Active Grille Air Shutter “A” Performance/Stuck Off 

P05B2 – Active Grille Air Shutter “B” Control Circuit Range/Performance

If you can’t identify or fix the issue independently, you should take your vehicle to a qualified mechanic or dealership. They have the specialized tools and knowledge to diagnose and repair complex issues with the active air flap system. Please ensure you try all the steps in this article, as a fix from a mechanic can cost as much as $1300.



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