P05A9
Active Grille Air Shutter B Position Sensor Circuit
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring connections between the active grille air shutter and the position sensor circuit
- Inspect and clean the active grille air shutter to ensure it is not stuck or obstructed
- Replace the active grille air shutter B position sensor if it is faulty or malfunctioning
- Reset the vehicle's computer system to clear any error codes related to the active grille air shutter B position sensor circuit
Common causes
Most likely first
- Faulty or damaged B position sensor
- Wiring or connection issues in the circuit
- Malfunctioning grille air shutter motor
- Low voltage or battery issues affecting the sensor circuit
- Software or programming errors in the vehicle's computer system
How to diagnose & fix
Work through it in order
- Engine misfires or runs rough
- Reduced engine power
- Poor fuel efficiency
- Check engine light illuminates
- Problems with the vehicle's cooling system
Read & clear P05A9 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.