VOLVO
ABS-00B0 - Power brake booster pressure build-up valve. Faulty signal. Permanent fault
System
Anti-lock Braking System (ABS)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)
Show models by year and engine (4)
What does this fault code mean?
The pre-pressure valve in the brake booster gives the ABS control module information about brake system pressure and the driver's intent. When the driver presses the brake pedal, the stability control must be disengaged. The module has registered a faulty signal from this valve, and the fault is present right now. This code applies only to cars with stability control.
Possible causes
- Resistance build-up or corrosion at the plugs and joints
- Open circuit in the wiring
- Wiring shorted to ground or supply voltage
- Incorrectly fitted or defective pressure sensor
- Faulty ABS control module
What you can do
- 1Inspect the plugs on the ABS module and on the pre-pressure valve for resistance and corrosion
- 2Reconnect any disturbed connectors and road test the car to see whether the fault returns
- 3Activate the valve with diagnostic equipment and check that its status switches between off and on
- 4Check the wiring to the valve for breaks and shorts to ground or supply voltage
- 5Remedy as needed and clear the code
- 6ABS and stability control are safety-critical – do not work on the brake booster or brake system yourself, have a workshop do it
Symptoms you may notice3
- Anti-spin does not function
- Stability function is absent
- Anti-spin warning lamp lit
What the fault can affect2
- Anti-spin function is blocked
- Stability function is blocked
General guidance for car owners. Diagnosis on the car can point to a different cause.