VOLVO
UEM-00A9 - Control module. Configuration fault
System
Upper Electronic Module (UEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The upper electronic module (UEM) holds a configuration file that controls certain settings in the module. The code is set when the UEM finds that this configuration file is incorrect or missing. The factory settings are then used.
Possible causes
- Incorrect or missing configuration file
What you can do
- 1Have a workshop read off the programmed values from the module before anything is reprogrammed, if possible.
- 2Have a workshop load new software into the module. The module does not need to be replaced.
- 3If the code UEM-E001 is also set, have a workshop restore communication with the module.
- 4Clear the code and check whether it returns.
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- The control module uses its factory settings
General guidance for car owners. Diagnosis on the car can point to a different cause.