U0585Invalid Data Received From Active Grille Air Shutter Module A
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Active grille shutters close the front opening to cut drag and speed warm-up; CARB counts them as an off-cycle CO2 technology. The shutter actuator is usually a LIN slave of the engine controller. GM's 2025 ECM tables check the rolling counter, protection value and checksum of shutter module A's status frame and set U0585 after 3 bad frames in 10, with battery voltage of 11 V or more for 5 s; it is Type B, so the MIL lights after two trips, and the shutter performance test P059F waits while it is present. On the 2024 Traverse and Acadia, GM's PIT6133 traces U0585 on the upper shutter to firmware and replaces the shutter. Ford's 2014 list carries U0585 without MIL. U0284 is the lost-communication code.
- What you may notice
- Check engine light on
- Shutters stay in a fixed position
- Slightly higher fuel consumption
- Likely causes
- LikelyShutter actuator A with faulty firmware or internal fault (GM PIT6133)
- PossibleLIN wiring or connector at the front end damaged or wet
- RareReplacement actuator of the wrong variant
- 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: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.