U0585 code meaning
Invalid Data Received From Active Grille Air Shutter Module A
Network system Generic code U05xx codes Check engine light
What U0585 means
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.
U0585 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of U0585
- Check engine light on
- Shutters stay in a fixed position
- Slightly higher fuel consumption
Common causes of U0585
- Most likelyShutter actuator A with faulty firmware or internal fault (GM PIT6133)
- PossibleLIN wiring or connector at the front end damaged or wet
- Less likelyReplacement actuator of the wrong variant
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Active grille shutter module a
What each part of U0585 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 85 | The exact fault in that area. |
What to do next
- Note U0585 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0585
What does U0585 mean?
U0585 means "Invalid Data Received From Active Grille Air Shutter Module A". Active grille shutters close the front opening to cut drag and speed warm-up; CARB counts them as an off-cycle CO2 technology. It is a generic code, so it means the same on every make.
Is it safe to drive with U0585?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will U0585 fail an emissions test?
Yes, it can. U0585 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0585 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will U0585 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.