U0586 code meaning
Invalid Data Received From Active Grille Air Shutter Module B
Network system Generic code U05xx codes Check engine light
What U0586 means
Vehicles with two shutter assemblies, typically one in the upper grille and one in the lower bumper opening, report the second one as module B. U0586 means the engine controller gets status frames from that actuator but cannot trust them. GM documents it in its 2025 ECM tables (25OBDG04B) with the same counter, protection value and checksum test as for module A: 3 failures in 10 frames, at least 11 V for 5 s, Type B with MIL after two trips; the B shutter performance check P05AE pauses meanwhile. GM's PIT6133 for the 2024 Traverse and Acadia links U0586 to the lower shutter and false sets from early firmware. Ford's 2014 code list also contains U0586, without MIL. U0285 is total loss of contact.
U0586 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 U0586
- Check engine light on
- Lower shutter does not move
Common causes of U0586
- Most likelyLower shutter actuator B with faulty firmware or internal fault
- PossibleWiring or connector in the lower bumper area damaged by road debris or water
- Less likelyUpper and lower actuator swapped or wrong part fitted
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 b
What each part of U0586 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 86 | The exact fault in that area. |
What to do next
- Note U0586 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 U0586
What does U0586 mean?
U0586 means "Invalid Data Received From Active Grille Air Shutter Module B". Vehicles with two shutter assemblies, typically one in the upper grille and one in the lower bumper opening, report the second one as module B. It is a generic code, so it means the same on every make.
Is it safe to drive with U0586?
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 U0586 fail an emissions test?
Yes, it can. U0586 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 U0586 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will U0586 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.