VOLVO
SUM-U201A4A - Control Module Main Calibration Data. System Internal Failures. Incorrect component installed
System
Suspension Module (SUM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
Main calibration data is stored in the SUM and must match the main program. The fault code is set when they do not match, and the cause is that incorrect software has been downloaded into the control module.
Possible causes
- Incorrect software has been downloaded into the control module
What you can do
- 1Has the control module recently been replaced or programmed? Tell the workshop
- 2Clear the fault code and road test to see whether it comes back
- 3Have a workshop program the SUM with the correct software and calibrate it
Symptoms you may notice2
- A message appears in the information display
- The Four-C function does not work
What the fault can affect1
- The Four-C function is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.