VOLVO
BCM-0065 - Stop lamp switch. Faulty signal
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?
Relevant only on four-wheel-drive cars that have the TRACS traction system. The brake control module (BCM) compares the signal from the brake light switch with the signal from the pedal position sensor. If either signal is faulty, the code is set. The fault mainly affects traction control and may be due to the wiring or to one of the sensors.
Possible causes
- Signal wire to the brake light switch shorted to ground or supply voltage
- Defective brake light switch
- Defective pedal position sensor
What you can do
- 1If the ECM or CEM holds codes for the brake pedal sensor or brake light switch, deal with those first
- 2Check the connectors at the brake control module, the brake light switch and the pedal position sensor for contact resistance and oxidation
- 3Read the brake light switch status and the pedal position with diagnostic equipment while the brake pedal is pressed and released
- 4The brake system is safety critical: have a workshop repair the fault, and do not work on the brake pedal sensors or the brake light switch yourself
Symptoms you may notice1
- Traction control does not work
What the fault can affect1
- Traction control (TC) is disabled
General guidance for car owners. Diagnosis on the car can point to a different cause.