VOLVO
BCM-0133 - Brake pressure sensor 2. Signal too low
System
Brake Control Module (BCM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (11)
- Volvo S60 (2001–2009)2002–2009
- Volvo S80 (1999–2006)2002–2006
- Volvo V70 (2000–2008)2002–2008
- Volvo V70 XC / XC70 (2001–2007)2002–2007
- Volvo XC90 (2003–)2003–2004, 2015
- Volvo XC90 (2003–)2005–2006All engines except: B8444S
- Volvo XC90 (2003–)2007Engine B5254T2, D5244T4 only
- Volvo XC90 (2003–)2008–2010All engines except: B6324S, B8444S
- Volvo XC90 (2003–)2011All engines except: B6324S5, B8444S
- Volvo XC90 (2003–)2012All engines except: B6324S5
- Volvo XC90 (2003–)2013–2014Engine B5254T9 only
What does this fault code mean?
Brake pressure sensor 2 is the second of the two sensors that give the brake control module information about the pressure in the brake system. The code is set when the signal from the sensor is too low. Because the wires to the sensors may have been swapped during fitting, both should be checked.
Possible causes
- Open circuit in the wiring to the sensor
- Wiring shorted to ground or supply voltage
- Damaged pressure sensor
- Fault inside the brake control module (BCM)
What you can do
- 1Check the connectors at the brake control module and both pressure sensors for contact resistance and oxidation
- 2Check the wiring to the pressure sensors for open circuits and short circuits; the wires may have been swapped at fitting
- 3Read the pressure sensor values with diagnostic equipment
- 4The brake system is safety critical: do not work on the brake pressure sensors yourself, and have a workshop repair the fault
Symptoms you may notice5
- Anti-spin warning lamp on
- General yellow warning lamp on
- Anti-spin does not work
- Stability function does not work
- Anti-skid does not work
What the fault can affect1
- Traction control (TC), stability control (SC) and active yaw control (AYC) are disabled
General guidance for car owners. Diagnosis on the car can point to a different cause.