VOLVO
SWM-020A - Steering wheel module (SWM). Calibration fault
System
Steering Wheel Module (SWM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (10)
- Volvo C30 (2007–2013)2007–2011
- Volvo C30 (2007–2013)2012All engines except: D4162T, D5204T, D5204T5
- Volvo C30 (2007–2013)2013Engine B4204S3, B4204S4, B5254T7 only
- Volvo C30 Electric (2011–2013)2011–2013
- Volvo C70 (2006–2013)2006–2011
- Volvo C70 (2006–2013)2012–2013Engine B5254T7 only
- Volvo S40 (2004–2013)2004–2010
- Volvo S40 (2004–2013)2011–2012All engines except: D4162T, D5204T, D5204T5
- Volvo V50 (2004–2013)2004–2010
- Volvo V50 (2004–2013)2011–2012All engines except: D4162T, D5204T, D5204T5
What does this fault code mean?
The steering wheel module (SWM) logged that its calibration data has been erased. It then tells the brake control module (BCM) that the steering angle is unknown, because it cannot know the angle until the wheel has been turned some distance in either direction.
Possible causes
- Internal error in the steering wheel module (SWM)
What you can do
- 1Turn the steering wheel some distance one way and then the other so that the module can recalibrate
- 2Read and note the code, clear it and road test to see whether it returns
- 3Stability control is switched off while the fault is present, and the brake control module (BCM) lacks the angle, so drive carefully until it has been repaired
- 4If the fault returns, have a workshop replace the steering wheel module (SWM)
Symptoms you may notice2
- Traction control warning lamp lit
- The stability control system does not function
What the fault can affect1
- Active yaw control (AYC) is blocked
General guidance for car owners. Diagnosis on the car can point to a different cause.