VOLVO
BCM-C004762 - Brake Booster Pressure Sensor. Algorithm Based Failures. Signal compare failure
System
Brake Control Module (BCM)
Volvo models this fault code applies to
Applies to the following models:
11 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V50 (2004–2013), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (14)
- Volvo C30 (2007–2013)2011–2013Engine D4162T, D5204T, D5204T5 only
- Volvo C70 (2006–2013)2011Engine D5204T, D5204T5 only
- Volvo C70 (2006–2013)2012–2013All engines except: B5254T7
- Volvo S40 (2004–2013)2011–2012Engine D4162T, D5204T, D5204T5 only
- Volvo S60 (2011–)2011–2015
- Volvo S80 (2007–)2007–2015
- Volvo V50 (2004–2013)2011–2012Engine D4162T, D5204T, D5204T5 only
- Volvo V60 (2011–)2011–2012
- Volvo V60 (2011–)2013–2014All engines except: D82PHEV
- Volvo V60 (2011–)2015All engines except: D82PHEV, D87PHEV
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008–2015
- Volvo XC60 (2009–)2009–2015
- Volvo XC70 (2008–)2008–2015
What does this fault code mean?
The brake control module (BCM) compares the signal from the vacuum pressure sensor in the brake booster with the signal from the brake pressure sensor. When the vacuum signal does not match the brake pressure, the module judges it to be incorrect.
Possible causes
- Damaged vacuum pressure sensor
- Internal fault in the brake control module
What you can do
- 1Read and note the code, clear it and road test the car to see whether it returns
- 2Start the engine and have a workshop read the vacuum pressures in the brake booster with diagnostic equipment while the brake pedal is pressed
- 3If the vacuum pressures do not agree, the vacuum sensor needs replacing by a workshop. If they agree, the fault may have been temporary
- 4The braking system is safety critical: do not work on the brake booster yourself; leave this to a workshop, and drive carefully until the fault is fixed
Symptoms you may notice1
- Information lamp lit
General guidance for car owners. Diagnosis on the car can point to a different cause.