OBD-II code · Network
U045B Invalid Data Received From Anti-Lock Brake System (ABS) Control Module B
A receiving module detected implausible data from ABS control module B (typically secondary brake controller in twin-system architectures). Wheel-speed, slip or pressure values fail plausibility checks and are rejected.
Is it safe to drive with U045B?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- ABS Module B
Related codes
- U0458Invalid Data Received From Information Center B
- U0459Invalid Data Received From Head Up Display
- U045AInvalid Data Received From Parking Assist Control Module A
- U045CInvalid Data Received From Power Steering Control Module B
- U045DInvalid Data Received From Automated Driving System Control Module A
- U045EInvalid Data Received From Automated Driving System Control Module B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.