P05AC
Active Grille Air Shutter B Position Sensor Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring connections to the Active Grille Air Shutter B Position Sensor
- Inspect the Active Grille Air Shutter B Position Sensor for any physical damage or corrosion
- Replace the Active Grille Air Shutter B Position Sensor
- Verify the functionality of the Active Grille Air Shutter B Position Sensor using a multimeter
Common causes
Most likely first
- Malfunctioning active grille air shutter B position sensor
- Short circuit or damaged wiring in the sensor circuit
- Faulty connection or loose connector in the sensor circuit
- Incorrect sensor calibration or programming
- Issue with the air grille assembly itself
How to diagnose & fix
Work through it in order
- Engine misfires or runs rough
- Poor fuel efficiency
- Check engine light illuminates
- Engine stalls or hesitates
- Decreased performance or lack of power
Read & clear P05AC yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.