Code Definition

B0000 (5A) — ABS wheel speed sensor serial data missing when vehicle speed above 5 km/h

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B0000

B0000 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B0000 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B0000 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

B0000:5A is set by the ABS control module when it detects missing serial wheel speed data once the vehicle exceeds 5 km/h. The very low speed threshold indicates a hard or near complete loss of the sensor data stream rather than an intermittent high speed dropout, because even at walking pace the ABS module expects continuous data from every corner to arbitrate vehicle speed. The ABS system relies on this data to monitor wheel rotation, detect lock up, and modulate brake pressure during an ABS event, and because the fault triggers so early in the driving cycle it will set on virtually every ke...

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