VOLVO
BCM-C004864 - Brake Booster Travel Sensor. Algorithm Based Failures. Signal plausibility failure
System
Brake Control Module (BCM)
Volvo models this fault code applies to
Applies to the following models:
14 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–), XC90 (2003–)
Show models by year and engine (19)
- 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–)2011–2015
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008–2015
- Volvo XC60 (2009–)2009–2015
- Volvo XC70 (2008–)2008–2015
- Volvo XC90 (2003–)2005–2006Engine B8444S only
- Volvo XC90 (2003–)2007–2010Engine B6324S, B8444S only
- Volvo XC90 (2003–)2011Engine B6324S5, B8444S only
- Volvo XC90 (2003–)2012Engine B6324S5 only
- Volvo XC90 (2003–)2013–2014All engines except: B5254T9
What does this fault code mean?
The brake control module (BCM) has received a signal from the pedal position sensor that it judges to be implausible. The sensor is part of active brake assistance, and on cars without it, the sensor is used to check the brake light switch.
Possible causes
- Break in the wires
- Wires shorted to ground or supply voltage
- Incorrectly fitted pedal position sensor
- Damaged pedal position 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
- 2Read the codes in the engine control module and the central electronic module first, as the fault may have been caused in the brake light circuit
- 3Check the connector at the pedal position sensor and at the brake control module for oxidation, contact resistance and looseness
- 4Check that the sensor is correctly seated and that the wiring has no break or short circuit
- 5Replace the pedal position sensor if it is damaged, and do not replace the brake control module before the fault has been investigated
- 6The braking system is safety critical: do not work on the pedal position sensor or brake booster yourself; leave this to a workshop, and drive carefully until the fault is fixed
Symptoms you may notice2
- General warning lamp on
- Brake assistance during hard braking may not work
What the fault can affect1
- Brake assistance (BA) is blocked
General guidance for car owners. Diagnosis on the car can point to a different cause.