What does it mean?
U01B3 is a Network and Communication (CAN bus, module communication) fault code. It indicates: Lost Communication With Brake Blending Actuator.
Lost Communication With Brake Blending Actuator
Severity
High
Can I keep driving?
Avoid extended driving; visit a service soon.
How is this code read?
This is a standard OBD-II code; any basic scanner reads it on vehicles built after 2004.
- UNetwork
- 0Generic code
- 1Network / Communication
- B3Sequence number
Codes From the Same System
All Fault Codes- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
Related Similar Codes
- U01B0Lost Communication With Battery Monitor Module
- U01B1Lost Communication With Particulate Matter Sensor B
- U01B2Lost Communication With Planetary Gear Set Control Module
- U01B4Lost Communication With Brake System Control Module B
- U01B5Lost Communication With Catalyst Heater Control Module
- U01B6Lost Communication With Fuel Heater Control Module
- U01B7Lost Communication With Switch Input Module “A”
- U01B8Lost Communication With Switch Input Module “B”
This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.