Diagnostic trouble code information

Condition

Fig 1: Identifying Brake Pressure Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

NOTE: This diagnostic trouble code applies only to ABS systems equipped with DSTC.

Brake pressure sensors 1 and 2 send a signal to the ABS control unit regarding the pressure in the braking system. If the control unit registers a faulty signal from a pressure sensor, diagnostic trouble code ABS-00A4 or ABS-00A5 is set, depending on the sensor.

Substitute Value

Anti-spin function blocked.
Stabilizing function blocked.

Possible Source

Open circuit in wiring.
The wiring is short-circuited to ground or voltage supply.
Sensor incorrectly fitted.
Defective pressure sensor.
Defective control unit.

Fault symptom[s]

Anti-spin does not work.
Stabilizing function not working.
Anti-spin warning lamp is on.