VOLVO
BCM-C004764 - Brake Booster Pressure Sensor. Algorithm Based Failures. Signal plausibility failure
System
Brake Control Module (BCM)
Volvo models this fault code applies to
Applies to the following models:
13 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (16)
- 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 V40 (2013–)2013–2015
- Volvo V40 Cross Country (2013–)2013–2015
- 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 vacuum pressure sensor in the brake booster has sent a signal that the brake control module judges to be implausible. The sensor measures the vacuum the brake booster uses to assist braking, so the fault can affect the braking assistance.
Possible causes
- Open circuit in the signal wire
- Signal wire shorted to supply voltage or ground
- 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 with diagnostic equipment while the pedal is pressed
- 3With the engine off, press the brake pedal firmly and hold it, then read the vacuum pressures again; they should match the first reading
- 4If the vacuum pressures do not agree, the vacuum sensor needs replacing by a workshop
- 5The 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 notice2
- Information lamp lit
- Yellow warning symbol and message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.