Code result
U045B
Invalid Data Received From Anti-Lock Brake System (ABS) Control Module B
High severity
What it means
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?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Module internal fault or sensor input drift
highOne of the most commonly reported causes for this code — check this first.
Software version mismatch after replacement
mediumA plausible cause — test and verify before replacing parts.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
Related help
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