P05A0Active Grille Air Shutter A Stuck On
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The active grille shutter (A = upper or only shutter, B = second) closes louvres to cut drag and speed warm-up and opens them for cooling; CARB names it as an off-cycle CO2 technology and requires its components to be monitored. P05A0 is the counterpart of P059F: at Toyota failure type 72 means the actuator stuck open, 74 slipping; VW, Audi and Mazda use it for sticking in general (Mazda after up to three clearing cycles). GM and Ford do not use it. An open shutter does not harm the engine but costs drag and warm-up time. Several fixes were software updates (Mazda, Audi Q7, VW Jetta); Audi's 2022–24 A3 limits top speed to 100 mph with a shutter fault.
- What you may notice
- Check engine light on
- Grille shutter warning (Toyota, Audi), speed limit (Audi)
- Slightly higher consumption, longer warm-up
- Likely causes
- LikelyDebris or ice holding the louvres open or blocking them
- PossibleEngine module or actuator software setting the code too early
- PossibleActuator slipping or gear worn
- RareLouvres or linkage broken
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.