U0586Invalid Data Received From Active Grille Air Shutter Module B
- 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
- 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.
- What you may notice
- Check engine light on
- Lower shutter does not move
- Likely causes
- LikelyLower shutter actuator B with faulty firmware or internal fault
- PossibleWiring or connector in the lower bumper area damaged by road debris or water
- RareUpper and lower actuator swapped or wrong part fitted
- 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.