U0284: Communication with the active grille shutters has been lost
Communication with the active grille shutters has been lost.
| Code | U0284 |
|---|---|
| System | Communication network |
| Group | U02xx, Lost communication with control units |
| Type | Generic: it means the same on every make |
How to read and clear U0284 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see U0284 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- U0279 The haptic feedback control unit is not answering on the car network
- U027A The onboard charger control unit C is not answering on the car network
- U027B The onboard charger control unit D is not answering on the car network
- U027C The external charge station controller is not answering on the car network
- U0285 The active grille air shutter module B is not answering on the car network
- U0286 Communication with the radiator anti-tamper device is lost
- U0287 The gearbox oil pump module is not answering on the car network
- U0288 DC to AC inverter control unit A is not answering on the car network
What does code U0284 mean?
Communication with the active grille shutters has been lost.
How do you clear U0284?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, U0284 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
