What it means
Active grille air shutter C stays in the open position when commanded to close. Aerodynamic drag and warm-up time are affected.
At a glance
- Usually lights the check-engine light
How it works
Active grille shutter C is a movable section of the grille that opens for cooling airflow and closes when less airflow is needed. This code sets when the shutter remains open after the control system commands it closed, which can increase drag and extend engine warm-up.
Common causes
Most likely first.
- Shutter actuator mechanically stuck
- Linkage iced or jammed
- Carbon or debris buildup preventing free movement
Symptoms
- Check-engine light
- Reduced fuel economy
- Longer engine warm-up time
How to diagnose it
- Save freeze-frame data and use a scan tool, if available, to compare the commanded position of shutter C with its reported position.
- Inspect shutter C and its grille opening for ice, leaves, stones, or other debris holding the blades open.
- With the vehicle off, check whether shutter C's blades and linkage move freely without forcing the actuator.
- Inspect the shutter C actuator connector and wiring for looseness, corrosion, or damage.
- If the blades are clear and the wiring is sound, test the actuator and position feedback using the manufacturer's procedure.
Common fixes
- Remove ice or debris obstructing shutter C.
- Free or repair a jammed shutter C linkage.
- Repair a damaged actuator connector or wiring.
- Replace the shutter C actuator or assembly if it is stuck or fails its test.
Can I keep driving?
You can generally drive if there are no overheating or other warnings, but expect reduced fuel economy and slower warm-up. Watch for temperature warnings because an open shutter can affect airflow management.
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.