garajizOBD-II code · generic
U01B4
Lost Communication With Brake System Control Module B
- System
- U — In-vehicle network
- Severity
- Critical (5/5)
- Can I keep driving?
- Drive with caution
What does U01B4 mean?
U01B4 is defined as “Lost Communication With Brake System Control Module B”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Related codes
- U01B3Lost Communication With Brake Blending Actuator
- U01B5Lost Communication With Catalyst Heater Control Module
- U01B2Lost Communication With Planetary Gear Set Control Module
- U01B6Lost Communication With Fuel Heater Control Module
- U01B1Lost Communication With Particulate Matter Sensor B
- U01B7Lost Communication With Switch Input Module “A”
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.