U0133: The active roll control unit is not answering on the car network
The active roll control unit is not answering on the car network. It is usually that control unit, its power supply or the network wiring.
| Code | U0133 |
|---|---|
| System | Communication network |
| Group | U01xx, Lost communication with control units |
| Type | Generic: it means the same on every make |
How to read and clear U0133 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 U0133 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
- U012E The camshaft position control unit is not answering on the car network
- U0130 Communication with the steering control unit has been lost
- U0131 Lost communication with the power steering control module
- U0132 Communication with suspension control unit A has been lost
- U0134 The rear power steering control unit is not answering on the car network
- U0135 The front differential control unit is not answering on the car network
- U0136 The rear differential control unit is not answering on the car network
- U0137 The trailer brake control unit is not answering on the car network
- U0100 Lost communication with engine control module (ECM/PCM A)
- U0101 Lost communication with transmission control module (TCM)
- U0102 Lost communication with transfer case control module
- U0103 Lost communication with the gear shift module
What does code U0133 mean?
The active roll control unit is not answering on the car network. It is usually that control unit, its power supply or the network wiring.
How do you clear U0133?
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, U0133 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.
