P05AF
Active Grille Air Shutter B Stuck On
Generic OBD-II
Common symptoms
What you'll notice
- Inspect and clean the grille air shutter mechanism for any debris or obstructions.
- Check and replace any damaged or faulty grille air shutter components.
- Reset the powertrain control module (PCM) by disconnecting the car's battery for a few minutes.
- Ensure the wiring and electrical connections related to the grille air shutter are intact and functioning correctly.
- If all else fails, consider replacing the grille air shutter unit altogether.
Common causes
Most likely first
- Faulty grille air shutter actuator
- Wiring or electrical connections issue
- Control module malfunction
- Blocked or restricted grille air shutter
- Mechanical issue with the air shutter mechanism
How to diagnose & fix
Work through it in order
- Engine overheating
- Reduced fuel efficiency
- Poor engine performance
- Illuminated check engine light
- Limited airflow to the radiator
Read & clear P05AF yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.