What it means
Active Grille Air Shutter B Performance Stuck Off: the actuator is stuck in the off position. Active grille shutters manage airflow for engine cooling and aerodynamics.
At a glance
- Usually lights the check-engine light
How it works
Active grille shutter B moves to control airflow through the grille for engine cooling and aerodynamic drag. P05AE sets when the control module detects that shutter B is stuck in its off position rather than moving as expected, which can reduce cooling airflow and cause the fan to work harder.
Common causes
Most likely first.
- Shutter jammed by debris or ice
- Carbon or debris buildup preventing free movement
- Component wear with age - mechanical play
Symptoms
- Check-engine light
- Shutter B may remain closed
- Engine may run hotter or cooling fan may run more often
How to diagnose it
- Review freeze-frame and live data to confirm the commanded and reported positions when shutter B failed to move.
- With the vehicle safely parked and the engine off, inspect shutter B for ice, road debris, or buildup obstructing its movement.
- Check shutter B's blades and linkage for misalignment, looseness, wear, or damage that could hold it in the off position.
- Use a scan tool to command shutter B, if supported, and observe whether the actuator attempts movement or the position reading changes.
- If the mechanism is clear, test the actuator, position feedback, and wiring using the vehicle's service information.
Common fixes
- Remove ice or debris obstructing shutter B.
- Clean buildup that prevents the shutter or linkage from moving freely.
- Realign or secure loose shutter B linkage.
- Replace a worn shutter assembly or failed actuator after confirming it cannot move correctly.
Can I keep driving?
Drive cautiously and monitor engine temperature, since a shutter stuck in the off position may restrict cooling airflow. Avoid heavy loads and stop if the engine overheats.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.