VOLVO
SAS-U000188 - High Speed CAN Communication Bus. Bus Signal / Message Failures. Bus off
System
Steering Angle Sensor (SAS)
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 (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–)2010–2015
- 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–)2010–2015
- Volvo XC60 (2009–)2010–2015
- Volvo XC70 (2008–)2010–2015
What does this fault code mean?
Bus-off means the steering angle sensor (SAS) disconnects itself from the CAN bus. This happens when serious interference on the high speed network blocks communication. The cause may be a short or open circuit in the CAN wiring, or an internal fault in the sensor or in another control module on the same part of the network.
Possible causes
- Short circuit between the CAN wires.
- Open circuit in one or both CAN wires.
- Internal fault in the steering angle sensor (SAS).
- Internal fault in another control module on the same part of the CAN network.
What you can do
- 1If you have recently disconnected connectors or replaced parts on the car, check that the connectors are firmly seated and correctly connected.
- 2Clear the code, start the engine and check whether it returns.
- 3Have a workshop measure the CAN wiring, since this needs measuring equipment and knowledge of the network.
- 4The angle sensor is connected to the anti-spin and stability systems. Have a workshop carry out the repair rather than working on the steering wheel yourself.
Symptoms you may notice5
- A yellow warning symbol and text message show in the display
- The anti-spin and anti-skid warning lamp lights up or behaves abnormally
- The anti-spin function does not work
- The stability function does not work
- The active chassis does not work
What the fault can affect1
- The sensor disconnects itself from the CAN bus
General guidance for car owners. Diagnosis on the car can point to a different cause.