P05A6Active Grille Air Shutter A Supply Voltage Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- An active grille shutter closes louvres in the grille to cut drag and speed warm-up and opens them for cooling; CARB names it as an off-cycle CO2 technology and treats the actuator as an output component. Smart actuators (Ford 3.0 L diesel, Toyota) check their own coil and supply and report over LIN; simpler ones (VW 1.8 T) have their own supply and a control line from the engine module. GM uses none of P05A2–P05A8. A fault usually only costs fuel and warm-up time. P05A6 means the actuator's battery supply via fuse or relay is missing or open; without supply there is no movement, and smart actuators also drop off the LIN bus (U0284). No manufacturer document available to us uses this code. GM feeds its actuator via a relay but uses other codes.
- What you may notice
- Check engine light on
- Shutter inoperative
- Possibly also U0284
- Likely causes
- LikelyFuse blown or relay faulty
- PossibleBroken wire or connector off in the front end
- PossibleActuator ground open
- RareActuator faulty internally
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €10 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.